46 lines
1.2 KiB
GLSL
46 lines
1.2 KiB
GLSL
#version 450 core
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layout (set = 0, binding = 0) uniform Matrices {
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mat4 view;
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mat4 proj;
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float time;
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vec3 cam_pos;
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vec2 viewport;
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float tess_factor;
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float tess_edge_size;
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};
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layout(set = 0, binding = 1) uniform sampler2D heightmap;
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layout(quads, equal_spacing, ccw) in;
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layout (location = 0) in vec3 norm[];
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layout (location = 1) in vec2 texCoord[];
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layout (location = 2) in vec3 pos[];
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layout (location = 0) out vec3 _norm;
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layout (location = 1) out vec2 _texCoord;
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layout (location = 2) out vec3 _pos;
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void main() {
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/* interpolation of UV coordinates */
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vec2 uv1 = mix(texCoord[0], texCoord[1], gl_TessCoord.x);
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vec2 uv2 = mix(texCoord[3], texCoord[2], gl_TessCoord.x);
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_texCoord = mix(uv1, uv2, gl_TessCoord.y);
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vec3 norm1 = mix(norm[0], norm[1], gl_TessCoord.x);
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vec3 norm2 = mix(norm[3], norm[2], gl_TessCoord.x);
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_norm = mix(norm1, norm2, gl_TessCoord.y);
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/* not displacing yet */
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vec4 pos1 = mix(gl_in[0].gl_Position, gl_in[1].gl_Position, gl_TessCoord.x);
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vec4 pos2 = mix(gl_in[3].gl_Position, gl_in[2].gl_Position, gl_TessCoord.x);
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vec4 fpos = mix(pos1, pos2, gl_TessCoord.y);
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fpos.y += 5.0 * textureLod(heightmap, _texCoord, 0.0).r;
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_pos = fpos.xyz;
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gl_Position = proj * view * fpos;
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} |