63 lines
1.2 KiB
GLSL
63 lines
1.2 KiB
GLSL
#version 330 core
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// Vertex attributes.
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layout (location = 0) in vec3 vertex_position;
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layout (location = 1) in vec3 vertex_texture;
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layout (location = 2) in float vertex_lighting;
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// Input matrices.
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uniform mat4 matrix_projection;
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uniform mat4 matrix_view;
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uniform mat4 matrix_model;
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// Input time (in seconds).
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uniform float time_in_seconds;
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// Output to the fragment shader.
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out vec3 frag_texture;
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out float frag_lighting;
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out float frag_distance;
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// Shader code.
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void main()
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{
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// Multiply the vertex position by the projection, view, and model
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// matrices to find the final position.
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gl_Position = matrix_projection * matrix_view * matrix_model * vec4(vertex_position, 1.0f);
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// Pass the texture vertex attribute and the lighting vertex attribute to
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// the fragment shader.
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frag_texture = vertex_texture;
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if (frag_texture.z < 0.0f)
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{
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// Animate the texture.
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frag_texture.z = abs(frag_texture.z) + mod(floor(time_in_seconds * 16.0f), 31.0f);
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}
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frag_lighting = vertex_lighting;
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// Pass the distance to the origin squared to the fragment shader, so that
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// it is simple to calculate fog density.
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frag_distance =
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(
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gl_Position.x * gl_Position.x +
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gl_Position.y * gl_Position.y +
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gl_Position.z * gl_Position.z
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);
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} |