83 lines
2.0 KiB
GLSL
83 lines
2.0 KiB
GLSL
#type vertex
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#version 410 core
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// Vertex attributes
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layout(location = 0) in vec3 v_position;
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layout(location = 1) in vec3 v_normal;
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layout(location = 2) in vec2 v_UV;
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// Outputs to fragment shader
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out vec3 normalWS;
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out vec3 normalVS;
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out vec3 positionVS;
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// Uniforms
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uniform mat4 u_worldMatrix;
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uniform mat4 u_viewMatrix;
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void main()
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{
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gl_Position = u_viewMatrix * u_worldMatrix * vec4(v_position, 1.0);
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positionVS = gl_Position.xyz;
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mat3 normalMatrix = transpose(inverse(mat3(u_worldMatrix)));
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normalWS = normalize(normalMatrix * v_normal);
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mat3 normalMatrixView = transpose(inverse(mat3(u_viewMatrix * u_worldMatrix)));
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normalVS = normalize(normalMatrixView * v_normal);
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}
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#type fragment
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#version 410 core
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// Fragment outputs
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layout(location = 0) out vec4 fragColor;
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layout(location = 1) out int objectID;
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// Inputs from vertex shader
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in vec3 normalWS;
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in vec3 normalVS;
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in vec3 positionVS;
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// Uniforms
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uniform int u_objectID;
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void main()
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{
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// Directional light
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vec3 lightDir = normalize(vec3(1.0, 7.0, 3.0));
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// Base light intensity
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float light = clamp(dot(normalize(normalWS), lightDir) * 0.8 + 0.2, 0.0, 1.0);
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// Gradient from purple (dark) to cyan (lit)
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vec3 gradientColor = mix(
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vec3(0.9412, 0.4471, 0.7137),
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vec3(1.0, 0.9725, 0.5255),
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light
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);
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// Rim/fresnel effect
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float rim = 0.5 - dot(normalize(normalWS), normalize(lightDir)) * 0.5;
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float rimValue = rim * rim * rim * rim;
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vec3 rimColor = vec3(1.0, 0.8, 0.5) * (rim * rim * rim * rim);
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vec3 mixedColor = mix(
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gradientColor,
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vec3(1, 1, 1) ,
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rimValue
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);
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//float fresnel = dot(, vec3(0, 0, -1));
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//fresnel = fresnel * fresnel;
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float fresnel = 1 + dot(normalize(positionVS), normalize(normalVS));
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fresnel = fresnel * fresnel * fresnel * fresnel;
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// Combine everything
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fragColor = vec4(normalize(normalWS) * 0.5 + vec3(0.5, 0.5, 0.5), 1.0);
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// Object ID output
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objectID = u_objectID;
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} |