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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_trans_fragment.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_trans_fragment.glsl')
-rw-r--r-- | client/shaders/shadow_shaders/pass1_trans_fragment.glsl | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/client/shaders/shadow_shaders/pass1_trans_fragment.glsl b/client/shaders/shadow_shaders/pass1_trans_fragment.glsl new file mode 100644 index 000000000..9f9e5be8c --- /dev/null +++ b/client/shaders/shadow_shaders/pass1_trans_fragment.glsl @@ -0,0 +1,38 @@ +uniform sampler2D ColorMapSampler; +varying vec4 tPos; + +#ifdef COLORED_SHADOWS +// c_precision of 128 fits within 7 base-10 digits +const float c_precision = 128.0; +const float c_precisionp1 = c_precision + 1.0; + +float packColor(vec3 color) +{ + return floor(color.b * c_precision + 0.5) + + floor(color.g * c_precision + 0.5) * c_precisionp1 + + floor(color.r * c_precision + 0.5) * c_precisionp1 * c_precisionp1; +} + +const vec3 black = vec3(0.0); +#endif + +void main() +{ + vec4 col = texture2D(ColorMapSampler, gl_TexCoord[0].st); +#ifndef COLORED_SHADOWS + if (col.a < 0.5) + discard; +#endif + + float depth = 0.5 + tPos.z * 0.5; + // ToDo: Liso: Apply movement on waving plants + // depth in [0, 1] for texture + + //col.rgb = col.a == 1.0 ? vec3(1.0) : col.rgb; +#ifdef COLORED_SHADOWS + float packedColor = packColor(mix(col.rgb, black, col.a)); + gl_FragColor = vec4(depth, packedColor, 0.0,1.0); +#else + gl_FragColor = vec4(depth, 0.0, 0.0, 1.0); +#endif +} |