fe11f495d6
this effectively undoes a recent change, where we had a method for spot lights and one for the directional light. instead, we can calculate the bias at the correct Z on the caller side -- which is needed only for spotlights.
27 lines
914 B
GLSL
27 lines
914 B
GLSL
//------------------------------------------------------------------------------
|
|
// Shadowing
|
|
//------------------------------------------------------------------------------
|
|
|
|
#if defined(HAS_SHADOWING)
|
|
/**
|
|
* Computes the light space position of the specified world space point.
|
|
* The returned point may contain a bias to attempt to eliminate common
|
|
* shadowing artifacts such as "acne". To achieve this, the world space
|
|
* normal at the point must also be passed to this function.
|
|
* Normal bias is not used for VSM.
|
|
*/
|
|
|
|
highp vec4 computeLightSpacePosition(highp vec3 p, const highp vec3 n,
|
|
const highp vec3 l, const float b, const highp mat4 lightFromWorldMatrix) {
|
|
|
|
#if !defined(HAS_VSM)
|
|
highp float NoL = saturate(dot(n, l));
|
|
highp float sinTheta = sqrt(1.0 - NoL * NoL);
|
|
p += n * (sinTheta * b);
|
|
#endif
|
|
|
|
return mulMat4x4Float3(lightFromWorldMatrix, p);
|
|
}
|
|
|
|
#endif // HAS_SHADOWING
|