mirror of
https://github.com/minetest/minetest.git
synced 2024-11-11 02:03:46 +01:00
27 lines
573 B
Plaintext
27 lines
573 B
Plaintext
|
uniform mat4 LightMVP; // world matrix
|
||
|
|
varying vec4 tPos;
|
||
|
|
|
||
|
|
const float bias0 = 0.9;
|
||
|
|
const float zPersFactor = 0.5;
|
||
|
|
const float bias1 = 1.0 - bias0 + 1e-6;
|
||
|
|
|
||
|
|
vec4 getPerspectiveFactor(in vec4 shadowPosition)
|
||
|
|
{
|
||
|
|
float pDistance = length(shadowPosition.xy);
|
||
|
|
float pFactor = pDistance * bias0 + bias1;
|
||
|
|
shadowPosition.xyz *= vec3(vec2(1.0 / pFactor), zPersFactor);
|
||
|
|
|
||
|
|
return shadowPosition;
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
void main()
|
||
|
|
{
|
||
|
|
vec4 pos = LightMVP * gl_Vertex;
|
||
|
|
|
||
|
|
tPos = getPerspectiveFactor(LightMVP * gl_Vertex);
|
||
|
|
|
||
|
|
gl_Position = vec4(tPos.xyz, 1.0);
|
||
|
|
gl_TexCoord[0].st = gl_MultiTexCoord0.st;
|
||
|
|
}
|