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https://github.com/luanti-org/luanti.git
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3d39781b21
The normal map was not bound properly, so the shading based on the height map had gone missing.
37 lines
1.4 KiB
GLSL
37 lines
1.4 KiB
GLSL
uniform sampler2D baseTexture;
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#define normalTexture texture1
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uniform sampler2D normalTexture;
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uniform vec3 yawVec;
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VARYING_ lowp vec4 varColor;
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VARYING_ mediump vec2 varTexCoord;
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void main (void)
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{
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vec2 uv = varTexCoord.st;
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//texture sampling rate
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const float step = 1.0 / 256.0;
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float tl = texture2D(normalTexture, vec2(uv.x - step, uv.y + step)).r;
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float t = texture2D(normalTexture, vec2(uv.x, uv.y + step)).r;
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float tr = texture2D(normalTexture, vec2(uv.x + step, uv.y + step)).r;
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float r = texture2D(normalTexture, vec2(uv.x + step, uv.y )).r;
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float br = texture2D(normalTexture, vec2(uv.x + step, uv.y - step)).r;
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float b = texture2D(normalTexture, vec2(uv.x, uv.y - step)).r;
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float bl = texture2D(normalTexture, vec2(uv.x - step, uv.y - step)).r;
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float l = texture2D(normalTexture, vec2(uv.x - step, uv.y )).r;
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float dX = (tr + 2.0 * r + br) - (tl + 2.0 * l + bl);
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float dY = (bl + 2.0 * b + br) - (tl + 2.0 * t + tr);
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vec4 bump = vec4 (normalize(vec3 (dX, dY, 0.1)),1.0);
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float height = 2.0 * texture2D(normalTexture, vec2(uv.x, uv.y)).r - 1.0;
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vec4 base = texture2D(baseTexture, uv).rgba;
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vec3 L = normalize(vec3(0.0, 0.75, 1.0));
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float specular = pow(clamp(dot(reflect(L, bump.xyz), yawVec), 0.0, 1.0), 1.0);
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float diffuse = dot(yawVec, bump.xyz);
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vec3 color = (1.1 * diffuse + 0.05 * height + 0.5 * specular) * base.rgb;
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vec4 col = vec4(color.rgb, base.a);
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col *= varColor;
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gl_FragColor = vec4(col.rgb, base.a);
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}
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