Ykkrosh
039f26f0c3
# More useful environment (water, lighting) editing (now saved into the map files). Fixed no-PCH a bit. This was SVN commit r4002.
144 lines
3.7 KiB
C++
144 lines
3.7 KiB
C++
/**
|
|
* =========================================================================
|
|
* File : LightEnv.h
|
|
* Project : Pyrogenesis
|
|
* Description : CLightEnv, a class describing the current lights
|
|
*
|
|
* @author Rich Cross <rich@wildfiregames.com>
|
|
* @author Nicolai Hähnle <nicolai@wildfiregames.com>
|
|
* =========================================================================
|
|
*/
|
|
|
|
#ifndef __LIGHTENV_H
|
|
#define __LIGHTENV_H
|
|
|
|
#include "Color.h"
|
|
#include "maths/Vector3D.h"
|
|
|
|
class CMapWriter;
|
|
class CMapReader;
|
|
|
|
/**
|
|
* Class CLightEnv: description of a lighting environment - contains all the
|
|
* necessary parameters for representation of the lighting within a scenario
|
|
*/
|
|
class CLightEnv
|
|
{
|
|
friend class CMapWriter;
|
|
friend class CMapReader;
|
|
friend class CXMLReader;
|
|
private:
|
|
/**
|
|
* m_Elevation: Height of sun above the horizon, in radians.
|
|
* For example, an elevation of PI/2 means the sun is straight up.
|
|
*/
|
|
float m_Elevation;
|
|
|
|
/**
|
|
* m_Rotation: Direction of sun on the compass, in radians.
|
|
* For example, a rotation of zero means the sun is in the direction (0,0,-1)
|
|
* and a rotation of PI/2 means the sun is in the direction (1,0,0) (not taking
|
|
* elevation into account).
|
|
*/
|
|
float m_Rotation;
|
|
|
|
/**
|
|
* m_TerrainShadowTransparency: Fraction of diffuse light that reaches shadowed terrain.
|
|
* A value of 0.0 means shadowed polygons get only ambient light, while a value of 1.0
|
|
* means shadows don't have any effect at all.
|
|
*/
|
|
float m_TerrainShadowTransparency;
|
|
|
|
CVector3D m_SunDir;
|
|
|
|
public:
|
|
RGBColor m_SunColor;
|
|
RGBColor m_TerrainAmbientColor;
|
|
RGBColor m_UnitsAmbientColor;
|
|
|
|
public:
|
|
CLightEnv();
|
|
|
|
float GetElevation() const { return m_Elevation; }
|
|
float GetRotation() const { return m_Rotation; }
|
|
const CVector3D& GetSunDir() const { return m_SunDir; }
|
|
float GetTerrainShadowTransparency() const { return m_TerrainShadowTransparency; }
|
|
|
|
void SetElevation(float f);
|
|
void SetRotation(float f);
|
|
|
|
void SetTerrainShadowTransparency(float f);
|
|
|
|
/**
|
|
* EvaluateTerrain: Calculate brightness of a point of the terrain with the given normal
|
|
* vector.
|
|
* The resulting color contains both ambient and diffuse light.
|
|
*
|
|
* @param normal normal vector (must have length 1)
|
|
* @param color resulting color
|
|
*/
|
|
void EvaluateTerrain(const CVector3D& normal, RGBColor& color) const
|
|
{
|
|
float dot = -normal.Dot(m_SunDir);
|
|
|
|
color = m_TerrainAmbientColor;
|
|
if (dot > 0)
|
|
color += m_SunColor * dot;
|
|
}
|
|
|
|
/**
|
|
* EvaluateUnit: Calculate brightness of a point of a unit with the given normal
|
|
* vector.
|
|
* The resulting color contains both ambient and diffuse light.
|
|
*
|
|
* @param normal normal vector (must have length 1)
|
|
* @param color resulting color
|
|
*/
|
|
void EvaluateUnit(const CVector3D& normal, RGBColor& color) const
|
|
{
|
|
float dot = -normal.Dot(m_SunDir);
|
|
|
|
color = m_UnitsAmbientColor;
|
|
if (dot > 0)
|
|
color += m_SunColor * dot;
|
|
}
|
|
|
|
/**
|
|
* EvaluateDirect: Like EvaluateTerrain and EvaluateUnit, but return only the direct
|
|
* sunlight term without ambient.
|
|
*
|
|
* @param normal normal vector (must have length 1)
|
|
* @param color resulting color
|
|
*/
|
|
void EvaluateDirect(const CVector3D& normal, RGBColor& color) const
|
|
{
|
|
float dot = -normal.Dot(m_SunDir);
|
|
|
|
if (dot > 0)
|
|
color = m_SunColor * dot;
|
|
else
|
|
color = CVector3D(0,0,0);
|
|
}
|
|
|
|
// Comparison operators
|
|
bool operator==(const CLightEnv& o) const
|
|
{
|
|
return m_Elevation == o.m_Elevation &&
|
|
m_Rotation == o.m_Rotation &&
|
|
m_TerrainShadowTransparency == o.m_TerrainShadowTransparency &&
|
|
m_SunColor == o.m_SunColor &&
|
|
m_TerrainAmbientColor == o.m_TerrainAmbientColor &&
|
|
m_UnitsAmbientColor == o.m_UnitsAmbientColor;
|
|
}
|
|
|
|
bool operator!=(const CLightEnv& o) const
|
|
{
|
|
return !(*this == o);
|
|
}
|
|
|
|
private:
|
|
void CalculateSunDirection();
|
|
};
|
|
|
|
#endif
|