46 lines
1.1 KiB
GLSL
46 lines
1.1 KiB
GLSL
#type vertex
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#version 450 core
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layout(location = 0) in vec3 a_Position;
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layout(location = 1) in vec3 a_Normal;
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uniform mat4 u_Model;
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uniform mat4 u_View;
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uniform mat4 u_Projection;
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uniform float u_OutlineWidth;
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uniform float u_Epsilon;
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void main() {
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vec4 viewPos = u_View * u_Model * vec4(a_Position, 1.0);
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mat3 normalMatrix = mat3(transpose(inverse(u_View * u_Model)));
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vec3 viewNormal = normalize(normalMatrix * a_Normal);
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float ndotv = abs(dot(viewNormal, vec3(0.0, 0.0, -1.0)));
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float outlineFactor = 1.0 - smoothstep(0.0, u_Epsilon, ndotv);
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vec3 expandNormal = normalize(vec3(viewNormal.xy, 0.0));
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float depth = -viewPos.z;
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float depthScale = clamp(depth * 0.02, 0.5, 2.0);
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viewPos.xyz += expandNormal * u_OutlineWidth * depthScale * outlineFactor;
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gl_Position = u_Projection * viewPos;
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}
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#type fragment
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#version 450 core
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layout(location = 0) out vec4 o_Color;
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layout(location = 1) out int o_ObjectID;
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uniform vec4 u_OutlineColor = vec4(0.0, 0.0, 0.0, 1.0);
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uniform int u_ObjectID = -1;
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void main() {
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o_Color = u_OutlineColor;
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o_ObjectID = u_ObjectID;
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}
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