108 lines
2.3 KiB
Plaintext
108 lines
2.3 KiB
Plaintext
#Material
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Name BlinnPhong+HalfLambert shading model only color
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Reference https://zhuanlan.zhihu.com/p/442023993
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Base Std3D/BlinnPhong
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//某些Require并不真的存在.ubo文件，写成一行一个是为了方便未来改成带路径的
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Require LocalToWorld
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Require Camera
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define HAVE_SPECULAR off //默认不定义HAVE_SPECULAR
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UBO
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{
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File BlinnPhongSun.ubo //文件名,如果/开头表示从ShaderLibrary根目录开始，没有则表示同一目录
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Struct BlinnPhongSun //结构名称
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Name sun //在代码中的变量名
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Stage Fragment //会引用的shader
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Set Global //Descriptor Set
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}
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#MaterialInstance
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Length 16
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Stage Fragment
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Code
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{
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vec3 Color;
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float Gloss;
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}
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#VertexInput
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vec3 Normal
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#Vertex
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Output
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{
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vec4 Position;
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vec3 Normal;
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}
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Code
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{
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mat3 GetNormalMatrix()
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{
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return mat3(camera.view*GetLocalToWorld());
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}
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vec3 GetNormal(mat3 normal_matrix,vec3 normal)
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{
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return normalize(normal_matrix*normal);
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}
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void main()
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{
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mat3 normal_matrix=GetNormalMatrix();
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Output.Normal =GetNormal(normal_matrix,Normal);
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Output.Position =GetPosition3D();
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HandoverMI();
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gl_Position =Output.Position;
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}
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}
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#Fragment
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Output
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{
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vec4 FragColor;
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}
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Code
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{
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void main()
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{
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MaterialInstance mi=GetMI();
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//将法线归一化
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// vec3 world_normal =normalize(Input.Normal);
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//对世界坐标下的灯光方法归一化
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// vec3 world_light_direction =normalize(sun.direction.xyz);
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//点乘法线和光照
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float intensity=0.5*max(dot(Input.Normal,sun.direction.xyz),0.0)+0.5;
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//直接光颜色
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vec3 direct_color =intensity*sun.color.rgb*mi.Color.rgb;
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// #ifndef HAVE_SPECULAR
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// FragColor=vec4(direct_color,1.0);
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// #else
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vec3 spec_color=vec3(0.0);
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if(intensity>0.0)
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{
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vec3 half_vector=normalize(sun.direction.xyz+normalize(Input.Position.xyz+camera.pos));
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float specular=max(dot(half_vector,Input.Normal),0.0);
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spec_color=specular*pow(specular,mi.Gloss)*sun.color.rgb;
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}
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FragColor=vec4(direct_color+spec_color,1.0);
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// #endif//HAVE_SPECULAR
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}
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}
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