43 lines
1001 B
Plaintext
43 lines
1001 B
Plaintext
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#version 450
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#extension GL_GOOGLE_include_directive : enable
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#include "lib/common.glsl"
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#include "lib/forward_vertex.glsl"
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CAMERA(0, camera)
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STORAGE_BUFFER(1, Object, objects)
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// Attributes
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IN(0, vec3, position)
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IN(1, vec3, normal)
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IN(2, vec2, texcoord)
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void main()
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{
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out_object = gl_InstanceIndex;
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mat4 m = objects.item[out_object].model;
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vec3 center = (m * vec4(0, 0, 0, 1.0)).xyz;
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vec3 lookDirection = normalize(center - camera.Eye.xyz);
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vec3 up = vec3(0, 1, 0);
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vec3 right = normalize(cross(up, lookDirection));
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up = normalize(cross(lookDirection, right));
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out_world_position = center +
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right * in_position.x +
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up * in_position.y;
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// texture coords
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out_color.xy = in_texcoord;
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// gbuffer view position
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out_view_position = (camera.View * vec4(out_world_position.xyz, 1.0)).xyz;
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// world normal is always facing the camera
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out_world_normal = normalize(center - camera.Eye.xyz);
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// vertex clip space position
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gl_Position = camera.Proj * vec4(out_view_position, 1);
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}
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