forked from Mirrorlandia_minetest/minetest
50 lines
1.2 KiB
GLSL
50 lines
1.2 KiB
GLSL
uniform mat4 mWorld;
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uniform vec3 eyePosition;
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uniform float animationTimer;
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varying vec3 vNormal;
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varying vec3 vPosition;
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varying vec3 worldPosition;
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varying lowp vec4 varColor;
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varying mediump vec2 varTexCoord;
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varying vec3 eyeVec;
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varying float vIDiff;
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const float e = 2.718281828459;
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const float BS = 10.0;
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float directional_ambient(vec3 normal)
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{
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vec3 v = normal * normal;
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if (normal.y < 0.0)
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return dot(v, vec3(0.670820, 0.447213, 0.836660));
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return dot(v, vec3(0.670820, 1.000000, 0.836660));
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}
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void main(void)
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{
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varTexCoord = (mTexture * inTexCoord0).st;
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gl_Position = mWorldViewProj * inVertexPosition;
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vPosition = gl_Position.xyz;
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vNormal = inVertexNormal;
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worldPosition = (mWorld * inVertexPosition).xyz;
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eyeVec = -(mWorldView * inVertexPosition).xyz;
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#if (MATERIAL_TYPE == TILE_MATERIAL_PLAIN) || (MATERIAL_TYPE == TILE_MATERIAL_PLAIN_ALPHA)
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vIDiff = 1.0;
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#else
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// This is intentional comparison with zero without any margin.
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// If normal is not equal to zero exactly, then we assume it's a valid, just not normalized vector
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vIDiff = length(inVertexNormal) == 0.0
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? 1.0
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: directional_ambient(normalize(inVertexNormal));
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#endif
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varColor = inVertexColor;
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}
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