ShadowTextureFunction Class Reference

Inheritance diagram for ShadowTextureFunction:

Collaboration diagram for ShadowTextureFunction:

List of all members.

Public Member Functions
virtual void	operator() (float u, float v, float w, unsigned char *pixel)
	ShadowTextureFunction (float _umbra)
Public Attributes
float	umbra

---

Constructor & Destructor Documentation

ShadowTextureFunction::ShadowTextureFunction (  float  _umbra  )  [inline]

Definition at line 255 of file render.cpp. : umbra(_umbra) {};

---

Member Function Documentation

void ShadowTextureFunction::operator() (  float  u, float  v, float  w, unsigned char *  pixel )  [virtual]

Implements TexelFunctionObject. Definition at line 260 of file render.cpp. References sqrt(), and umbra. { float r = (float) sqrt(u * u + v * v); int pixVal = 255; // Leave some white pixels around the edges to the shadow doesn't // 'leak'. We'll also set the maximum mip map level for this texture to 3 // so we don't have problems with the edge texels at high mip map levels. r = r / (15.0f / 16.0f); if (r < 1) { // The pixel value should depend on the area of the sun which is // occluded. We just fudge it here and use the square root of the // radius. if (r <= umbra) pixVal = 0; else pixVal = (int) (sqrt((r - umbra) / (1 - umbra)) * 255.99f); } pixel[0] = pixVal; pixel[1] = pixVal; pixel[2] = pixVal; };

---

Member Data Documentation

float ShadowTextureFunction::umbra

Definition at line 257 of file render.cpp. Referenced by operator()().

---

The documentation for this class was generated from the following file:

• src/celengine/render.cpp

---