mirror of
https://github.com/Kelsidavis/WoWee.git
synced 2026-04-17 09:33:51 +00:00
1c718dce22
Drop specular lighting from terrain shader — ground materials (dirt, grass, stone) are purely diffuse and specular highlights made them look plastic. Replace Reinhard tonemapper with a shoulder-only compressor that is identity below 0.9 and softly rolls off HDR values above, preserving scene contrast.
87 lines
2.4 KiB
GLSL
87 lines
2.4 KiB
GLSL
#version 330 core
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in vec3 FragPos;
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in vec3 Normal;
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in vec2 TexCoord;
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in vec2 LayerUV;
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out vec4 FragColor;
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// Texture layers (up to 4)
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uniform sampler2D uBaseTexture;
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uniform sampler2D uLayer1Texture;
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uniform sampler2D uLayer2Texture;
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uniform sampler2D uLayer3Texture;
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// Alpha maps for blending
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uniform sampler2D uLayer1Alpha;
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uniform sampler2D uLayer2Alpha;
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uniform sampler2D uLayer3Alpha;
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// Layer control
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uniform int uLayerCount;
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uniform bool uHasLayer1;
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uniform bool uHasLayer2;
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uniform bool uHasLayer3;
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// Lighting
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uniform vec3 uLightDir;
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uniform vec3 uLightColor;
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uniform vec3 uAmbientColor;
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// Camera
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uniform vec3 uViewPos;
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// Fog
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uniform vec3 uFogColor;
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uniform float uFogStart;
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uniform float uFogEnd;
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void main() {
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// Sample base texture
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vec4 baseColor = texture(uBaseTexture, TexCoord);
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vec4 finalColor = baseColor;
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// Apply texture layers with alpha blending
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// TexCoord = tiling UVs for texture sampling (repeats across chunk)
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// LayerUV = 0-1 per-chunk UVs for alpha map sampling
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if (uHasLayer1) {
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vec4 layer1Color = texture(uLayer1Texture, TexCoord);
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float alpha1 = texture(uLayer1Alpha, LayerUV).r;
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finalColor = mix(finalColor, layer1Color, alpha1);
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}
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if (uHasLayer2) {
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vec4 layer2Color = texture(uLayer2Texture, TexCoord);
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float alpha2 = texture(uLayer2Alpha, LayerUV).r;
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finalColor = mix(finalColor, layer2Color, alpha2);
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}
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if (uHasLayer3) {
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vec4 layer3Color = texture(uLayer3Texture, TexCoord);
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float alpha3 = texture(uLayer3Alpha, LayerUV).r;
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finalColor = mix(finalColor, layer3Color, alpha3);
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}
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// Normalize normal
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vec3 norm = normalize(Normal);
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vec3 lightDir = normalize(-uLightDir);
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// Ambient lighting
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vec3 ambient = uAmbientColor * finalColor.rgb;
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// Diffuse lighting (two-sided for terrain hills)
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float diff = abs(dot(norm, lightDir));
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diff = max(diff, 0.2); // Minimum light to prevent completely dark faces
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vec3 diffuse = diff * uLightColor * finalColor.rgb;
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// Combine lighting (terrain is purely diffuse — no specular on ground)
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vec3 result = ambient + diffuse;
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// Apply fog
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float distance = length(uViewPos - FragPos);
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float fogFactor = clamp((uFogEnd - distance) / (uFogEnd - uFogStart), 0.0, 1.0);
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result = mix(uFogColor, result, fogFactor);
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FragColor = vec4(result, 1.0);
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}
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