43 lines
1.1 KiB
GLSL
43 lines
1.1 KiB
GLSL
!!permu FOG
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!!samps reflectcube
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!!cvardf r_skyfog=0.5
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!!cvard4 r_glsl_skybox_orientation=0 0 0 0
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!!cvardf r_glsl_skybox_autorotate=1
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#include "sys/defs.h"
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#include "sys/fog.h"
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//simple shader for simple skyboxes.
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varying vec3 pos;
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#ifdef VERTEX_SHADER
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mat3 rotateAroundAxis(vec4 axis) //xyz axis, with angle in w
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{
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if (bool(r_glsl_skybox_autorotate))
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axis.w *= e_time;
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axis.w *= (3.14/180.0);
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axis.xyz = normalize(axis.xyz);
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float s = sin(axis.w);
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float c = cos(axis.w);
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float oc = 1.0 - c;
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return mat3(oc * axis.x * axis.x + c, oc * axis.x * axis.y - axis.z * s, oc * axis.z * axis.x + axis.y * s,
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oc * axis.x * axis.y + axis.z * s, oc * axis.y * axis.y + c, oc * axis.y * axis.z - axis.x * s,
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oc * axis.z * axis.x - axis.y * s, oc * axis.y * axis.z + axis.x * s, oc * axis.z * axis.z + c);
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}
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void main ()
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{
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pos = v_position.xyz - e_eyepos;
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if (r_glsl_skybox_orientation.xyz != vec3(0.0))
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pos = pos*rotateAroundAxis(r_glsl_skybox_orientation);
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gl_Position = ftetransform();
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}
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#endif
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#ifdef FRAGMENT_SHADER
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void main ()
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{
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vec4 skybox = textureCube(s_reflectcube, pos);
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gl_FragColor = skybox;
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}
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#endif
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