2006-04-24 01:14:18 +02:00
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#include "precompiled.h"
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#include "TerrainOverlay.h"
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#include "ps/Game.h"
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#include "ps/World.h"
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#include "graphics/Terrain.h"
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#include "maths/MathUtil.h"
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#include "lib/ogl.h"
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#include <algorithm>
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2007-10-09 09:27:45 +02:00
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#include "ps/GameSetup/Config.h"
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2006-04-24 01:14:18 +02:00
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// Handy things for STL:
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/// Functor for sorting pairs, using the <-ordering of their second values.
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struct compare2nd
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{
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template<typename S, typename T> bool operator()(const std::pair<S, T>& a, const std::pair<S, T>& b) const
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{
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return a.second < b.second;
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}
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};
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/// Functor for comparing the firsts of pairs to a specified value.
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template<typename S> struct equal1st
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{
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const S& val;
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equal1st(const S& val) : val(val) {}
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template <typename T> bool operator()(const std::pair<S, T>& a) const
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{
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return a.first == val;
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}
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private:
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const equal1st& operator=(const equal1st& rhs);
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};
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/// Functor for calling ->Render on pairs' firsts.
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struct render1st
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{
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template<typename S, typename T> void operator()(const std::pair<S, T>& a) const
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{
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a.first->Render();
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}
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};
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//////////////////////////////////////////////////////////////////////////
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// Global overlay list management:
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static std::vector<std::pair<TerrainOverlay*, int> > g_TerrainOverlayList;
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TerrainOverlay::TerrainOverlay(int priority)
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{
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// Add to global list of overlays
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g_TerrainOverlayList.push_back(std::make_pair(this, priority));
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// Sort by overlays by priority. Do stable sort so that adding/removing
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// overlays doesn't randomly disturb all the existing ones (which would
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// be noticeable if they have the same priority and overlap).
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std::stable_sort(g_TerrainOverlayList.begin(), g_TerrainOverlayList.end(),
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compare2nd());
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}
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TerrainOverlay::~TerrainOverlay()
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{
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std::vector<std::pair<TerrainOverlay*, int> >::iterator newEnd =
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std::remove_if(g_TerrainOverlayList.begin(), g_TerrainOverlayList.end(),
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equal1st<TerrainOverlay*>(this));
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g_TerrainOverlayList.erase(newEnd, g_TerrainOverlayList.end());
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}
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2007-10-09 09:27:45 +02:00
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//initial test to draw out entity boundaries
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//it shows how to retrieve object boundary postions for triangulation
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//NOTE: it's a test to see how to retrieve bounadry locations for static objects on the terrain.
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//disabled
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void TerrainOverlay::RenderEntityEdges()
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{
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//Kai: added for line drawing
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//use a function to encapsulate all the entity boundaries
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std::vector<CEntity*> results;
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g_EntityManager.GetExtant(results);
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glColor3f( 1, 1, 1 ); // Colour outline with player colour
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for(int i =0 ; i < results.size(); i++)
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{
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glBegin(GL_LINE_LOOP);
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CEntity* tempHandle = results[i];
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debug_printf("Entity position: %f %f %f\n", tempHandle->m_position.X,tempHandle->m_position.Y,tempHandle->m_position.Z);
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CVector2D p, q;
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CVector2D u, v;
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q.x = tempHandle->m_position.X;
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q.y = tempHandle->m_position.Z;
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float d = ((CBoundingBox*)tempHandle->m_bounds)->m_d;
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float w = ((CBoundingBox*)tempHandle->m_bounds)->m_w;
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u.x = sin( tempHandle->m_graphics_orientation.Y );
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u.y = cos( tempHandle->m_graphics_orientation.Y );
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v.x = u.y;
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v.y = -u.x;
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CBoundingObject* m_bounds = tempHandle->m_bounds;
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switch( m_bounds->m_type )
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{
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case CBoundingObject::BOUND_CIRCLE:
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{
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break;
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}
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case CBoundingObject::BOUND_OABB:
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{
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//glVertex3f( tempHandle->m_position.X, tempHandle->GetAnchorLevel( tempHandle->m_position.X, tempHandle->m_position.Z ) + 10.0f, tempHandle->m_position.Z ); // lower left vertex
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//glVertex3f( 5, tempHandle->GetAnchorLevel( 5, 5 ) + 0.25f, 5 ); // upper vertex
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p = q + u * d + v * w;
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glVertex3f( p.x, tempHandle->GetAnchorLevel( p.x, p.y ) + + 10.0f, p.y );
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p = q - u * d + v * w ;
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glVertex3f( p.x, tempHandle->GetAnchorLevel( p.x, p.y ) + + 10.0f, p.y );
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p = q - u * d - v * w;
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glVertex3f( p.x, tempHandle->GetAnchorLevel( p.x, p.y ) + + 10.0f, p.y );
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p = q + u * d - v * w;
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glVertex3f( p.x, tempHandle->GetAnchorLevel( p.x, p.y ) + + 10.0f, p.y );
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break;
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}
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}//end switch
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glEnd();
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}//end for loop
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CTerrain* m_Terrain = g_Game->GetWorld()->GetTerrain();
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CEntity* tempHandle = results[0];
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glBegin(GL_LINE_LOOP);
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int width = m_Terrain->GetVerticesPerSide()*4;
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glVertex3f( 0, tempHandle->GetAnchorLevel( 0, 0 ) + 0.25f, 0 );
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glVertex3f( width, tempHandle->GetAnchorLevel( width, 0 ) + 0.25f, 0 );
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glVertex3f( width, tempHandle->GetAnchorLevel(width,width ) + 0.25f,width );
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glVertex3f( 0, tempHandle->GetAnchorLevel( 0, width ) + 0.25f, width );
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glEnd();
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//----------------------
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}
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2006-04-24 01:14:18 +02:00
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void TerrainOverlay::RenderOverlays()
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{
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if (g_TerrainOverlayList.size() == 0)
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return;
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glEnable(GL_BLEND);
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glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
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glDepthMask(GL_FALSE);
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// To ensure that outlines are drawn on top of the terrain correctly (and
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// don't Z-fight and flicker nastily), draw them as QUADS with the LINE
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// PolygonMode, and use PolygonOffset to pull them towards the camera.
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// (See e.g. http://www.opengl.org/resources/faq/technical/polygonoffset.htm)
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glPolygonOffset(-1.f, -1.f);
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glEnable(GL_POLYGON_OFFSET_LINE);
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2006-07-12 16:49:10 +02:00
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glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
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2006-04-24 01:14:18 +02:00
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std::for_each(g_TerrainOverlayList.begin(), g_TerrainOverlayList.end(),
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render1st());
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// Clean up state changes
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glEnable(GL_CULL_FACE);
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glEnable(GL_DEPTH_TEST);
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glDisable(GL_POLYGON_OFFSET_LINE);
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glPolygonMode(GL_FRONT_AND_BACK, GL_FILL);
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glDepthMask(GL_TRUE);
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glDisable(GL_BLEND);
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2007-10-09 09:27:45 +02:00
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//Kai: invoking the auxiliary function to draw out entity edges
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//RenderEntityEdges();
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2006-04-24 01:14:18 +02:00
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}
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//////////////////////////////////////////////////////////////////////////
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void TerrainOverlay::GetTileExtents(
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int& min_i_inclusive, int& min_j_inclusive,
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int& max_i_inclusive, int& max_j_inclusive)
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{
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// Default to whole map
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min_i_inclusive = min_j_inclusive = 0;
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max_i_inclusive = max_j_inclusive = m_Terrain->GetTilesPerSide()-1;
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}
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void TerrainOverlay::Render()
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{
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2007-10-09 09:27:45 +02:00
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if(g_showOverlay)
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{
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m_Terrain = g_Game->GetWorld()->GetTerrain();
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int min_i, min_j, max_i, max_j;
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GetTileExtents(min_i, min_j, max_i, max_j);
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// Clamp the min to 0, but the max to -1 - so tile -1 can never be rendered,
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// but if unclamped_max<0 then no tiles at all will be rendered. And the same
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// for the upper limit.
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min_i = clamp(min_i, 0, (int)m_Terrain->GetTilesPerSide());
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min_j = clamp(min_j, 0, (int)m_Terrain->GetTilesPerSide());
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max_i = clamp(max_i, -1, (int)m_Terrain->GetTilesPerSide()-1);
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max_j = clamp(max_j, -1, (int)m_Terrain->GetTilesPerSide()-1);
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for (m_j = min_j; m_j <= max_j; ++m_j)
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for (m_i = min_i; m_i <= max_i; ++m_i)
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ProcessTile(m_i, m_j);
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}
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2006-04-24 01:14:18 +02:00
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}
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void TerrainOverlay::RenderTile(const CColor& colour, bool draw_hidden)
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{
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// TODO: if this is unpleasantly slow, make it much more efficient
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// (e.g. buffering data and making a single draw call? or at least
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// far fewer calls than it makes now)
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if (draw_hidden)
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{
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glDisable(GL_DEPTH_TEST);
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glDisable(GL_CULL_FACE);
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}
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else
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{
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glEnable(GL_DEPTH_TEST);
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glEnable(GL_CULL_FACE);
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}
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glPolygonMode(GL_FRONT_AND_BACK, GL_FILL);
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CVector3D pos;
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glBegin(GL_QUADS);
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glColor4fv(colour.FloatArray());
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m_Terrain->CalcPosition(m_i, m_j, pos); glVertex3fv(pos.GetFloatArray());
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m_Terrain->CalcPosition(m_i+1, m_j, pos); glVertex3fv(pos.GetFloatArray());
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m_Terrain->CalcPosition(m_i+1, m_j+1, pos); glVertex3fv(pos.GetFloatArray());
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m_Terrain->CalcPosition(m_i, m_j+1, pos); glVertex3fv(pos.GetFloatArray());
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glEnd();
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}
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void TerrainOverlay::RenderTileOutline(const CColor& colour, int line_width, bool draw_hidden)
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{
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if (draw_hidden)
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{
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glDisable(GL_DEPTH_TEST);
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glDisable(GL_CULL_FACE);
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}
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else
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{
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glEnable(GL_DEPTH_TEST);
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glEnable(GL_CULL_FACE);
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}
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glPolygonMode(GL_FRONT_AND_BACK, GL_LINE);
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glLineWidth((float)line_width);
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CVector3D pos;
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glBegin(GL_QUADS);
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glColor4fv(colour.FloatArray());
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m_Terrain->CalcPosition(m_i, m_j, pos); glVertex3fv(pos.GetFloatArray());
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m_Terrain->CalcPosition(m_i+1, m_j, pos); glVertex3fv(pos.GetFloatArray());
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m_Terrain->CalcPosition(m_i+1, m_j+1, pos); glVertex3fv(pos.GetFloatArray());
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m_Terrain->CalcPosition(m_i, m_j+1, pos); glVertex3fv(pos.GetFloatArray());
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glEnd();
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}
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