Ykkrosh
e02d7ad949
Everything is char* now, so we don't need to mess around with different string types. Done with: ag -ls 'LOG(MESSAGE|MESSAGERENDER|WARNING|ERROR)' source | xargs perl -pi -e'1 while s/(LOG(MESSAGE|MESSAGERENDER|WARNING|ERROR).*)%[hl]s/$1%s/g' This was SVN commit r16187.
760 lines
22 KiB
C++
760 lines
22 KiB
C++
/* Copyright (C) 2013 Wildfire Games.
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* This file is part of 0 A.D.
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*
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* 0 A.D. is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 2 of the License, or
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* (at your option) any later version.
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*
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* 0 A.D. is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with 0 A.D. If not, see <http://www.gnu.org/licenses/>.
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*/
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/*
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* Shadow mapping related texture and matrix management
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*/
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#include "precompiled.h"
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#include "gui/GUIutil.h"
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#include "lib/bits.h"
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#include "lib/ogl.h"
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#include "ps/CLogger.h"
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#include "ps/Profile.h"
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#include "graphics/LightEnv.h"
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#include "graphics/ShaderManager.h"
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#include "maths/BoundingBoxAligned.h"
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#include "maths/Brush.h"
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#include "maths/MathUtil.h"
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#include "maths/Matrix3D.h"
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#include "renderer/Renderer.h"
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#include "renderer/ShadowMap.h"
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///////////////////////////////////////////////////////////////////////////////////////////////////
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// ShadowMap implementation
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/**
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* Struct ShadowMapInternals: Internal data for the ShadowMap implementation
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*/
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struct ShadowMapInternals
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{
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// bit depth for the depth texture
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int DepthTextureBits;
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// the EXT_framebuffer_object framebuffer
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GLuint Framebuffer;
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// handle of shadow map
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GLuint Texture;
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// width, height of shadow map
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int Width, Height;
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// used width, height of shadow map
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int EffectiveWidth, EffectiveHeight;
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// transform light space into projected light space
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// in projected light space, the shadowbound box occupies the [-1..1] cube
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// calculated on BeginRender, after the final shadow bounds are known
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CMatrix3D LightProjection;
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// Transform world space into light space; calculated on SetupFrame
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CMatrix3D LightTransform;
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// Transform world space into texture space of the shadow map;
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// calculated on BeginRender, after the final shadow bounds are known
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CMatrix3D TextureMatrix;
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// transform light space into world space
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CMatrix3D InvLightTransform;
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// bounding box of shadowed objects in light space
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CBoundingBoxAligned ShadowCasterBound;
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CBoundingBoxAligned ShadowReceiverBound;
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CBoundingBoxAligned ShadowRenderBound;
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// Camera transformed into light space
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CCamera LightspaceCamera;
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// Some drivers (at least some Intel Mesa ones) appear to handle alpha testing
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// incorrectly when the FBO has only a depth attachment.
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// When m_ShadowAlphaFix is true, we use DummyTexture to store a useless
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// alpha texture which is attached to the FBO as a workaround.
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GLuint DummyTexture;
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// Copy of renderer's standard view camera, saved between
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// BeginRender and EndRender while we replace it with the shadow camera
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CCamera SavedViewCamera;
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// Save the caller's FBO so it can be restored
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GLint SavedViewFBO;
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// Helper functions
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void CalcShadowMatrices();
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void CreateTexture();
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};
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///////////////////////////////////////////////////////////////////////////////////////////////////
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// Construction/Destruction
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ShadowMap::ShadowMap()
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{
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m = new ShadowMapInternals;
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m->Framebuffer = 0;
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m->Texture = 0;
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m->DummyTexture = 0;
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m->Width = 0;
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m->Height = 0;
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m->EffectiveWidth = 0;
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m->EffectiveHeight = 0;
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m->DepthTextureBits = 0;
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// DepthTextureBits: 24/32 are very much faster than 16, on GeForce 4 and FX;
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// but they're very much slower on Radeon 9800.
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// In both cases, the default (no specified depth) is fast, so we just use
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// that by default and hope it's alright. (Otherwise, we'd probably need to
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// do some kind of hardware detection to work out what to use.)
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// Avoid using uninitialised values in AddShadowedBound if SetupFrame wasn't called first
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m->LightTransform.SetIdentity();
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}
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ShadowMap::~ShadowMap()
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{
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if (m->Texture)
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glDeleteTextures(1, &m->Texture);
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if (m->DummyTexture)
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glDeleteTextures(1, &m->DummyTexture);
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if (m->Framebuffer)
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pglDeleteFramebuffersEXT(1, &m->Framebuffer);
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delete m;
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}
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///////////////////////////////////////////////////////////////////////////////////////////////////
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// Force the texture/buffer/etc to be recreated, particularly when the renderer's
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// size has changed
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void ShadowMap::RecreateTexture()
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{
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if (m->Texture)
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glDeleteTextures(1, &m->Texture);
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if (m->DummyTexture)
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glDeleteTextures(1, &m->DummyTexture);
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if (m->Framebuffer)
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pglDeleteFramebuffersEXT(1, &m->Framebuffer);
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m->Texture = 0;
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m->DummyTexture = 0;
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m->Framebuffer = 0;
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// (Texture will be constructed in next SetupFrame)
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}
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//////////////////////////////////////////////////////////////////////////////
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// SetupFrame: camera and light direction for this frame
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void ShadowMap::SetupFrame(const CCamera& camera, const CVector3D& lightdir)
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{
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if (!m->Texture)
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m->CreateTexture();
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CVector3D z = lightdir;
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CVector3D y;
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CVector3D x = camera.m_Orientation.GetIn();
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CVector3D eyepos = camera.m_Orientation.GetTranslation();
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z.Normalize();
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x -= z * z.Dot(x);
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if (x.Length() < 0.001)
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{
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// this is invoked if the camera and light directions almost coincide
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// assumption: light direction has a significant Z component
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x = CVector3D(1.0, 0.0, 0.0);
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x -= z * z.Dot(x);
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}
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x.Normalize();
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y = z.Cross(x);
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// X axis perpendicular to light direction, flowing along with view direction
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m->LightTransform._11 = x.X;
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m->LightTransform._12 = x.Y;
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m->LightTransform._13 = x.Z;
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// Y axis perpendicular to light and view direction
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m->LightTransform._21 = y.X;
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m->LightTransform._22 = y.Y;
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m->LightTransform._23 = y.Z;
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// Z axis is in direction of light
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m->LightTransform._31 = z.X;
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m->LightTransform._32 = z.Y;
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m->LightTransform._33 = z.Z;
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// eye is at the origin of the coordinate system
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m->LightTransform._14 = -x.Dot(eyepos);
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m->LightTransform._24 = -y.Dot(eyepos);
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m->LightTransform._34 = -z.Dot(eyepos);
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m->LightTransform._41 = 0.0;
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m->LightTransform._42 = 0.0;
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m->LightTransform._43 = 0.0;
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m->LightTransform._44 = 1.0;
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m->LightTransform.GetInverse(m->InvLightTransform);
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m->ShadowCasterBound.SetEmpty();
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m->ShadowReceiverBound.SetEmpty();
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//
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m->LightspaceCamera = camera;
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m->LightspaceCamera.m_Orientation = m->LightTransform * camera.m_Orientation;
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m->LightspaceCamera.UpdateFrustum();
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}
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//////////////////////////////////////////////////////////////////////////////
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// AddShadowedBound: add a world-space bounding box to the bounds of shadowed
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// objects
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void ShadowMap::AddShadowCasterBound(const CBoundingBoxAligned& bounds)
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{
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CBoundingBoxAligned lightspacebounds;
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bounds.Transform(m->LightTransform, lightspacebounds);
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m->ShadowCasterBound += lightspacebounds;
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}
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void ShadowMap::AddShadowReceiverBound(const CBoundingBoxAligned& bounds)
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{
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CBoundingBoxAligned lightspacebounds;
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bounds.Transform(m->LightTransform, lightspacebounds);
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m->ShadowReceiverBound += lightspacebounds;
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}
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CFrustum ShadowMap::GetShadowCasterCullFrustum()
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{
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// Get the bounds of all objects that can receive shadows
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CBoundingBoxAligned bound = m->ShadowReceiverBound;
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// Intersect with the camera frustum, so the shadow map doesn't have to get
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// stretched to cover the off-screen parts of large models
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bound.IntersectFrustumConservative(m->LightspaceCamera.GetFrustum());
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// ShadowBound might have been empty to begin with, producing an empty result
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if (bound.IsEmpty())
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{
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// CFrustum can't easily represent nothingness, so approximate it with
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// a single point which won't match many objects
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bound += CVector3D(0.0f, 0.0f, 0.0f);
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return bound.ToFrustum();
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}
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// Extend the bounds a long way towards the light source, to encompass
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// all objects that might cast visible shadows.
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// (The exact constant was picked entirely arbitrarily.)
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bound[0].Z -= 1000.f;
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CFrustum frustum = bound.ToFrustum();
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frustum.Transform(m->InvLightTransform);
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return frustum;
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}
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///////////////////////////////////////////////////////////////////////////////////////////////////
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// CalcShadowMatrices: calculate required matrices for shadow map generation - the light's
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// projection and transformation matrices
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void ShadowMapInternals::CalcShadowMatrices()
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{
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// Start building the shadow map to cover all objects that will receive shadows
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CBoundingBoxAligned receiverBound = ShadowReceiverBound;
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// Intersect with the camera frustum, so the shadow map doesn't have to get
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// stretched to cover the off-screen parts of large models
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receiverBound.IntersectFrustumConservative(LightspaceCamera.GetFrustum());
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// Intersect with the shadow caster bounds, because there's no point
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// wasting space around the edges of the shadow map that we're not going
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// to draw into
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ShadowRenderBound[0].X = std::max(receiverBound[0].X, ShadowCasterBound[0].X);
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ShadowRenderBound[0].Y = std::max(receiverBound[0].Y, ShadowCasterBound[0].Y);
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ShadowRenderBound[1].X = std::min(receiverBound[1].X, ShadowCasterBound[1].X);
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ShadowRenderBound[1].Y = std::min(receiverBound[1].Y, ShadowCasterBound[1].Y);
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// Set the near and far planes to include just the shadow casters,
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// so we make full use of the depth texture's range. Add a bit of a
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// delta so we don't accidentally clip objects that are directly on
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// the planes.
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ShadowRenderBound[0].Z = ShadowCasterBound[0].Z - 2.f;
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ShadowRenderBound[1].Z = ShadowCasterBound[1].Z + 2.f;
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// ShadowBound might have been empty to begin with, producing an empty result
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if (ShadowRenderBound.IsEmpty())
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{
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// no-op
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LightProjection.SetIdentity();
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TextureMatrix = LightTransform;
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return;
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}
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// round off the shadow boundaries to sane increments to help reduce swim effect
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float boundInc = 16.0f;
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ShadowRenderBound[0].X = floor(ShadowRenderBound[0].X / boundInc) * boundInc;
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ShadowRenderBound[0].Y = floor(ShadowRenderBound[0].Y / boundInc) * boundInc;
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ShadowRenderBound[1].X = ceil(ShadowRenderBound[1].X / boundInc) * boundInc;
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ShadowRenderBound[1].Y = ceil(ShadowRenderBound[1].Y / boundInc) * boundInc;
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// Setup orthogonal projection (lightspace -> clip space) for shadowmap rendering
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CVector3D scale = ShadowRenderBound[1] - ShadowRenderBound[0];
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CVector3D shift = (ShadowRenderBound[1] + ShadowRenderBound[0]) * -0.5;
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if (scale.X < 1.0)
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scale.X = 1.0;
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if (scale.Y < 1.0)
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scale.Y = 1.0;
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if (scale.Z < 1.0)
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scale.Z = 1.0;
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scale.X = 2.0 / scale.X;
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scale.Y = 2.0 / scale.Y;
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scale.Z = 2.0 / scale.Z;
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// make sure a given world position falls on a consistent shadowmap texel fractional offset
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float offsetX = fmod(ShadowRenderBound[0].X - LightTransform._14, 2.0f/(scale.X*EffectiveWidth));
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float offsetY = fmod(ShadowRenderBound[0].Y - LightTransform._24, 2.0f/(scale.Y*EffectiveHeight));
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LightProjection.SetZero();
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LightProjection._11 = scale.X;
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LightProjection._14 = (shift.X + offsetX) * scale.X;
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LightProjection._22 = scale.Y;
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LightProjection._24 = (shift.Y + offsetY) * scale.Y;
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LightProjection._33 = scale.Z;
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LightProjection._34 = shift.Z * scale.Z;
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LightProjection._44 = 1.0;
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// Calculate texture matrix by creating the clip space to texture coordinate matrix
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// and then concatenating all matrices that have been calculated so far
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float texscalex = scale.X * 0.5f * (float)EffectiveWidth / (float)Width;
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float texscaley = scale.Y * 0.5f * (float)EffectiveHeight / (float)Height;
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float texscalez = scale.Z * 0.5f;
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CMatrix3D lightToTex;
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lightToTex.SetZero();
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lightToTex._11 = texscalex;
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lightToTex._14 = (offsetX - ShadowRenderBound[0].X) * texscalex;
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lightToTex._22 = texscaley;
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lightToTex._24 = (offsetY - ShadowRenderBound[0].Y) * texscaley;
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lightToTex._33 = texscalez;
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lightToTex._34 = -ShadowRenderBound[0].Z * texscalez;
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lightToTex._44 = 1.0;
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TextureMatrix = lightToTex * LightTransform;
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}
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//////////////////////////////////////////////////////////////////////////
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// Create the shadow map
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void ShadowMapInternals::CreateTexture()
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{
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// Cleanup
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if (Texture)
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{
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glDeleteTextures(1, &Texture);
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Texture = 0;
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}
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if (DummyTexture)
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{
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glDeleteTextures(1, &DummyTexture);
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DummyTexture = 0;
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}
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if (Framebuffer)
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{
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pglDeleteFramebuffersEXT(1, &Framebuffer);
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Framebuffer = 0;
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}
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// save the caller's FBO
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glGetIntegerv(GL_FRAMEBUFFER_BINDING_EXT, &SavedViewFBO);
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pglGenFramebuffersEXT(1, &Framebuffer);
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if (g_Renderer.m_ShadowMapSize != 0)
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{
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// non-default option to override the size
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Width = Height = g_Renderer.m_ShadowMapSize;
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}
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else
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{
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// get shadow map size as next power of two up from view width/height
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Width = Height = (int)round_up_to_pow2((unsigned)std::max(g_Renderer.GetWidth(), g_Renderer.GetHeight()));
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}
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// Clamp to the maximum texture size
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Width = std::min(Width, (int)ogl_max_tex_size);
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Height = std::min(Height, (int)ogl_max_tex_size);
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// Since we're using a framebuffer object, the whole texture is available
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EffectiveWidth = Width;
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EffectiveHeight = Height;
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const char* formatname;
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switch(DepthTextureBits)
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{
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case 16: formatname = "DEPTH_COMPONENT16"; break;
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case 24: formatname = "DEPTH_COMPONENT24"; break;
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case 32: formatname = "DEPTH_COMPONENT32"; break;
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default: formatname = "DEPTH_COMPONENT"; break;
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}
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LOGMESSAGE("Creating shadow texture (size %dx%d) (format = %s)",
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Width, Height, formatname);
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if (g_Renderer.m_Options.m_ShadowAlphaFix)
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{
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glGenTextures(1, &DummyTexture);
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g_Renderer.BindTexture(0, DummyTexture);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
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glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, Width, Height, 0, GL_RGBA, GL_UNSIGNED_BYTE, NULL);
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}
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glGenTextures(1, &Texture);
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g_Renderer.BindTexture(0, Texture);
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GLenum format;
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#if CONFIG2_GLES
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format = GL_DEPTH_COMPONENT;
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#else
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switch (DepthTextureBits)
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{
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case 16: format = GL_DEPTH_COMPONENT16; break;
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case 24: format = GL_DEPTH_COMPONENT24; break;
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case 32: format = GL_DEPTH_COMPONENT32; break;
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default: format = GL_DEPTH_COMPONENT; break;
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}
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#endif
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glTexImage2D(GL_TEXTURE_2D, 0, format, Width, Height, 0, GL_DEPTH_COMPONENT, GL_UNSIGNED_SHORT, NULL);
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// GLES requires type == UNSIGNED_SHORT or UNSIGNED_INT
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// set texture parameters
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
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#if CONFIG2_GLES
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// GLES doesn't do depth comparisons, so treat it as a
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// basic unfiltered depth texture
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
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#else
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// Enable automatic depth comparisons
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glTexParameteri(GL_TEXTURE_2D, GL_DEPTH_TEXTURE_MODE, GL_INTENSITY);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_COMPARE_MODE, GL_COMPARE_R_TO_TEXTURE);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_COMPARE_FUNC, GL_LEQUAL);
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// Use GL_LINEAR to trigger automatic PCF on some devices
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
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#endif
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ogl_WarnIfError();
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// bind to framebuffer object
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glBindTexture(GL_TEXTURE_2D, 0);
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pglBindFramebufferEXT(GL_FRAMEBUFFER_EXT, Framebuffer);
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pglFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT, GL_DEPTH_ATTACHMENT_EXT, GL_TEXTURE_2D, Texture, 0);
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if (g_Renderer.m_Options.m_ShadowAlphaFix)
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{
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pglFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT, GL_COLOR_ATTACHMENT0_EXT, GL_TEXTURE_2D, DummyTexture, 0);
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}
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else
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{
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#if CONFIG2_GLES
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#warning TODO: figure out whether the glDrawBuffer/glReadBuffer stuff is needed, since it is not supported by GLES
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#else
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glDrawBuffer(GL_NONE);
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#endif
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}
|
|
|
|
#if !CONFIG2_GLES
|
|
glReadBuffer(GL_NONE);
|
|
#endif
|
|
|
|
ogl_WarnIfError();
|
|
|
|
GLenum status = pglCheckFramebufferStatusEXT(GL_FRAMEBUFFER_EXT);
|
|
|
|
pglBindFramebufferEXT(GL_FRAMEBUFFER_EXT, SavedViewFBO);
|
|
|
|
if (status != GL_FRAMEBUFFER_COMPLETE_EXT)
|
|
{
|
|
LOGWARNING("Framebuffer object incomplete: 0x%04X", status);
|
|
|
|
// Disable shadow rendering (but let the user try again if they want)
|
|
g_Renderer.m_Options.m_Shadows = false;
|
|
}
|
|
}
|
|
|
|
|
|
///////////////////////////////////////////////////////////////////////////////////////////////////
|
|
// Set up to render into shadow map texture
|
|
void ShadowMap::BeginRender()
|
|
{
|
|
// HACK HACK: this depends in non-obvious ways on the behaviour of the caller
|
|
|
|
// save caller's FBO
|
|
glGetIntegerv(GL_FRAMEBUFFER_BINDING_EXT, &m->SavedViewFBO);
|
|
|
|
// Calc remaining shadow matrices
|
|
m->CalcShadowMatrices();
|
|
|
|
{
|
|
PROFILE("bind framebuffer");
|
|
glBindTexture(GL_TEXTURE_2D, 0);
|
|
pglBindFramebufferEXT(GL_FRAMEBUFFER_EXT, m->Framebuffer);
|
|
}
|
|
|
|
// clear buffers
|
|
{
|
|
PROFILE("clear depth texture");
|
|
// In case we used m_ShadowAlphaFix, we ought to clear the unused
|
|
// color buffer too, else Mali 400 drivers get confused.
|
|
// Might as well clear stencil too for completeness.
|
|
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT | GL_STENCIL_BUFFER_BIT);
|
|
glColorMask(0,0,0,0);
|
|
}
|
|
|
|
// setup viewport
|
|
const SViewPort vp = { 0, 0, m->EffectiveWidth, m->EffectiveHeight };
|
|
g_Renderer.SetViewport(vp);
|
|
|
|
m->SavedViewCamera = g_Renderer.GetViewCamera();
|
|
|
|
CCamera c = m->SavedViewCamera;
|
|
c.SetProjection(m->LightProjection);
|
|
c.GetOrientation() = m->InvLightTransform;
|
|
g_Renderer.SetViewCamera(c);
|
|
|
|
#if !CONFIG2_GLES
|
|
glMatrixMode(GL_PROJECTION);
|
|
glLoadMatrixf(&m->LightProjection._11);
|
|
glMatrixMode(GL_MODELVIEW);
|
|
glLoadMatrixf(&m->LightTransform._11);
|
|
#endif
|
|
|
|
glEnable(GL_SCISSOR_TEST);
|
|
glScissor(1,1, m->EffectiveWidth-2, m->EffectiveHeight-2);
|
|
}
|
|
|
|
|
|
///////////////////////////////////////////////////////////////////////////////////////////////////
|
|
// Finish rendering into shadow map texture
|
|
void ShadowMap::EndRender()
|
|
{
|
|
glDisable(GL_SCISSOR_TEST);
|
|
|
|
g_Renderer.SetViewCamera(m->SavedViewCamera);
|
|
|
|
{
|
|
PROFILE("unbind framebuffer");
|
|
pglBindFramebufferEXT(GL_FRAMEBUFFER_EXT, m->SavedViewFBO);
|
|
}
|
|
|
|
const SViewPort vp = { 0, 0, g_Renderer.GetWidth(), g_Renderer.GetHeight() };
|
|
g_Renderer.SetViewport(vp);
|
|
|
|
glColorMask(1,1,1,1);
|
|
}
|
|
|
|
|
|
///////////////////////////////////////////////////////////////////////////////////////////////////
|
|
// Retrieve the texture handle and texture matrix for shadowing
|
|
GLuint ShadowMap::GetTexture() const
|
|
{
|
|
return m->Texture;
|
|
}
|
|
|
|
const CMatrix3D& ShadowMap::GetTextureMatrix() const
|
|
{
|
|
return m->TextureMatrix;
|
|
}
|
|
|
|
|
|
///////////////////////////////////////////////////////////////////////////////////////////////////
|
|
// Depth texture bits
|
|
int ShadowMap::GetDepthTextureBits() const
|
|
{
|
|
return m->DepthTextureBits;
|
|
}
|
|
|
|
void ShadowMap::SetDepthTextureBits(int bits)
|
|
{
|
|
if (bits != m->DepthTextureBits)
|
|
{
|
|
if (m->Texture)
|
|
{
|
|
glDeleteTextures(1, &m->Texture);
|
|
m->Texture = 0;
|
|
}
|
|
m->Width = m->Height = 0;
|
|
|
|
m->DepthTextureBits = bits;
|
|
}
|
|
}
|
|
|
|
///////////////////////////////////////////////////////////////////////////////////////////////////
|
|
// Depth texture size
|
|
int ShadowMap::GetWidth() const
|
|
{
|
|
return m->Width;
|
|
}
|
|
|
|
int ShadowMap::GetHeight() const
|
|
{
|
|
return m->Height;
|
|
}
|
|
|
|
//////////////////////////////////////////////////////////////////////////////
|
|
|
|
void ShadowMap::RenderDebugBounds()
|
|
{
|
|
CShaderTechniquePtr shaderTech = g_Renderer.GetShaderManager().LoadEffect(str_gui_solid);
|
|
shaderTech->BeginPass();
|
|
CShaderProgramPtr shader = shaderTech->GetShader();
|
|
|
|
glDepthMask(0);
|
|
glDisable(GL_CULL_FACE);
|
|
|
|
// Render various shadow bounds:
|
|
// Yellow = bounds of objects in view frustum that receive shadows
|
|
// Red = culling frustum used to find potential shadow casters
|
|
// Green = bounds of objects in culling frustum that cast shadows
|
|
// Blue = frustum used for rendering the shadow map
|
|
|
|
shader->Uniform(str_transform, g_Renderer.GetViewCamera().GetViewProjection() * m->InvLightTransform);
|
|
|
|
shader->Uniform(str_color, 1.0f, 1.0f, 0.0f, 1.0f);
|
|
m->ShadowReceiverBound.RenderOutline(shader);
|
|
|
|
shader->Uniform(str_color, 0.0f, 1.0f, 0.0f, 1.0f);
|
|
m->ShadowCasterBound.RenderOutline(shader);
|
|
|
|
glEnable(GL_BLEND);
|
|
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
|
|
shader->Uniform(str_color, 0.0f, 0.0f, 1.0f, 0.25f);
|
|
m->ShadowRenderBound.Render(shader);
|
|
glDisable(GL_BLEND);
|
|
|
|
shader->Uniform(str_color, 0.0f, 0.0f, 1.0f, 1.0f);
|
|
m->ShadowRenderBound.RenderOutline(shader);
|
|
|
|
// Render light frustum
|
|
|
|
shader->Uniform(str_transform, g_Renderer.GetViewCamera().GetViewProjection());
|
|
|
|
CFrustum frustum = GetShadowCasterCullFrustum();
|
|
// We don't have a function to create a brush directly from a frustum, so use
|
|
// the ugly approach of creating a large cube and then intersecting with the frustum
|
|
CBoundingBoxAligned dummy(CVector3D(-1e4, -1e4, -1e4), CVector3D(1e4, 1e4, 1e4));
|
|
CBrush brush(dummy);
|
|
CBrush frustumBrush;
|
|
brush.Intersect(frustum, frustumBrush);
|
|
|
|
glEnable(GL_BLEND);
|
|
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
|
|
shader->Uniform(str_color, 1.0f, 0.0f, 0.0f, 0.25f);
|
|
frustumBrush.Render(shader);
|
|
glDisable(GL_BLEND);
|
|
|
|
shader->Uniform(str_color, 1.0f, 0.0f, 0.0f, 1.0f);
|
|
frustumBrush.RenderOutline(shader);
|
|
|
|
|
|
shaderTech->EndPass();
|
|
|
|
#if 0
|
|
CMatrix3D InvTexTransform;
|
|
|
|
m->TextureMatrix.GetInverse(InvTexTransform);
|
|
|
|
// Render representative texture rectangle
|
|
glPushMatrix();
|
|
glMultMatrixf(&InvTexTransform._11);
|
|
|
|
glEnable(GL_BLEND);
|
|
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
|
|
glColor4ub(255,0,0,64);
|
|
glBegin(GL_QUADS);
|
|
glVertex3f(0.0, 0.0, 0.0);
|
|
glVertex3f(1.0, 0.0, 0.0);
|
|
glVertex3f(1.0, 1.0, 0.0);
|
|
glVertex3f(0.0, 1.0, 0.0);
|
|
glEnd();
|
|
glDisable(GL_BLEND);
|
|
|
|
glPolygonMode(GL_FRONT_AND_BACK, GL_LINE);
|
|
glColor3ub(255,0,0);
|
|
glBegin(GL_QUADS);
|
|
glVertex3f(0.0, 0.0, 0.0);
|
|
glVertex3f(1.0, 0.0, 0.0);
|
|
glVertex3f(1.0, 1.0, 0.0);
|
|
glVertex3f(0.0, 1.0, 0.0);
|
|
glEnd();
|
|
glPolygonMode(GL_FRONT_AND_BACK, GL_FILL);
|
|
glPopMatrix();
|
|
#endif
|
|
|
|
glEnable(GL_CULL_FACE);
|
|
glDepthMask(1);
|
|
}
|
|
|
|
void ShadowMap::RenderDebugTexture()
|
|
{
|
|
glDepthMask(0);
|
|
|
|
glDisable(GL_DEPTH_TEST);
|
|
|
|
#if !CONFIG2_GLES
|
|
g_Renderer.BindTexture(0, m->Texture);
|
|
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_COMPARE_MODE, GL_NONE);
|
|
#endif
|
|
|
|
CShaderTechniquePtr texTech = g_Renderer.GetShaderManager().LoadEffect(str_gui_basic);
|
|
texTech->BeginPass();
|
|
CShaderProgramPtr texShader = texTech->GetShader();
|
|
|
|
texShader->Uniform(str_transform, GetDefaultGuiMatrix());
|
|
texShader->BindTexture(str_tex, m->Texture);
|
|
|
|
float s = 256.f;
|
|
float boxVerts[] = {
|
|
0,0, 0,s, s,0,
|
|
s,0, 0,s, s,s
|
|
};
|
|
float boxUV[] = {
|
|
0,0, 0,1, 1,0,
|
|
1,0, 0,1, 1,1
|
|
};
|
|
|
|
texShader->VertexPointer(2, GL_FLOAT, 0, boxVerts);
|
|
texShader->TexCoordPointer(GL_TEXTURE0, 2, GL_FLOAT, 0, boxUV);
|
|
texShader->AssertPointersBound();
|
|
glDrawArrays(GL_TRIANGLES, 0, 6);
|
|
|
|
texTech->EndPass();
|
|
|
|
#if !CONFIG2_GLES
|
|
g_Renderer.BindTexture(0, m->Texture);
|
|
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_COMPARE_MODE, GL_COMPARE_R_TO_TEXTURE);
|
|
#endif
|
|
|
|
glEnable(GL_DEPTH_TEST);
|
|
glDepthMask(1);
|
|
}
|