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author | Liso <anlismon@gmail.com> | 2021-06-06 18:51:21 +0200 |
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committer | GitHub <noreply@github.com> | 2021-06-06 18:51:21 +0200 |
commit | c47313db65f968559711ac1b505ef341a9872017 (patch) | |
tree | 63d9b1b2be512918e2361d96e4fb52ff1ec3f9de /client/shaders/shadow_shaders/pass1_vertex.glsl | |
parent | 46f42e15c41cf4ab23c5ff4cd8a7d99d94d10d7b (diff) | |
download | minetest-c47313db65f968559711ac1b505ef341a9872017.tar.gz minetest-c47313db65f968559711ac1b505ef341a9872017.tar.bz2 minetest-c47313db65f968559711ac1b505ef341a9872017.zip |
Shadow mapping render pass (#11244)
Co-authored-by: x2048 <codeforsmile@gmail.com>
Diffstat (limited to 'client/shaders/shadow_shaders/pass1_vertex.glsl')
-rw-r--r-- | client/shaders/shadow_shaders/pass1_vertex.glsl | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/client/shaders/shadow_shaders/pass1_vertex.glsl b/client/shaders/shadow_shaders/pass1_vertex.glsl new file mode 100644 index 000000000..a6d8b3db8 --- /dev/null +++ b/client/shaders/shadow_shaders/pass1_vertex.glsl @@ -0,0 +1,26 @@ +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(pos); + + gl_Position = vec4(tPos.xyz, 1.0); + gl_TexCoord[0].st = gl_MultiTexCoord0.st; +} |