56 lines
1.6 KiB
GLSL
56 lines
1.6 KiB
GLSL
#version 330 core
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// 从顶点着色器插值传入的变量
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in vec3 Position_worldspace;
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in vec3 Normal_cameraspace;
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in vec3 EyeDirection_cameraspace;
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in vec3 LightDirection_cameraspace;
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in vec2 UV;
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// 输出颜色
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out vec3 color;
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// Uniform 变量
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uniform sampler2D myTextureSampler; // 纹理采样器
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uniform vec3 lightColor; // 光源颜色
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uniform float lightPower; // 光照强度
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uniform vec3 viewPos; // 观察者位置（世界空间）
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uniform vec3 lightPos_worldspace; // 光源位置（世界空间）
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// 材质属性 (可以作为uniform传入，这里为了简单硬编码)
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vec3 materialDiffuseColor = vec3(1.0, 1.0, 1.0); // 从纹理获取
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vec3 materialAmbientColor = vec3(0.1, 0.1, 0.1);
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vec3 materialSpecularColor = vec3(0.5, 0.5, 0.5);
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float materialShininess = 32.0;
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void main(){
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// 环境光
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vec3 ambient = 0.3 * lightColor;
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// 法线和光照方向
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vec3 N = normalize(Normal_cameraspace);
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vec3 L = normalize(LightDirection_cameraspace);
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// 漫反射
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float diff = max(dot(N, L), 0.0);
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vec3 diffuse = diff * lightColor;
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// 镜面反射
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vec3 E = normalize(EyeDirection_cameraspace);
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vec3 R = reflect(-L, N);
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float spec = pow(max(dot(E, R), 0.0), 32.0);
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vec3 specular = 0.5 * spec * lightColor;
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// 距离衰减
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float distance = length(lightPos_worldspace - Position_worldspace);
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float attenuation = lightPower / (1.0 + 0.2 * distance * distance);
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// 采样纹理
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vec3 texColor = texture(myTextureSampler, UV).rgb;
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// 合成最终颜色
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color = (ambient + diffuse + specular) * texColor * attenuation;
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color = clamp(color, 0.0, 1.0);
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}
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