54 lines
1.4 KiB
GLSL
54 lines
1.4 KiB
GLSL
//======= Copyright (c) 2015-2020 Vera Visions LLC. All rights reserved. =======
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//
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// Purpose:
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//
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// Non-lit surface that predominantly offers environment cube reflection
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// modulated by the diffusemap's RGB. This is used for glass, for example.
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//==============================================================================
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!!ver 110
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!!permu FOG
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!!samps diffusemap=0 normalmap=1 cubemap:samplerCube=2
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#include "sys/defs.h"
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varying vec2 tex_c;
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varying vec3 eyevector;
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varying mat3 invsurface;
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#ifdef VERTEX_SHADER
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void main ()
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{
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tex_c = v_texcoord;
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invsurface[0] = v_svector;
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invsurface[1] = v_tvector;
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invsurface[2] = v_normal;
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vec3 eyeminusvertex = e_eyepos - v_position.xyz;
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eyevector.x = dot( eyeminusvertex, v_svector.xyz );
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eyevector.y = dot( eyeminusvertex, v_tvector.xyz );
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eyevector.z = dot( eyeminusvertex, v_normal.xyz );
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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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#include "sys/fog.h"
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void main ()
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{
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vec3 out_f;
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vec3 diffuse_f = texture2D(s_diffusemap, tex_c).rgb;
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vec3 normal_f = texture2D(s_normalmap, tex_c).rgb - 0.5;
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normal_f.x *= 0.2;
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normal_f.y *= 0.2;
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normal_f = normalize(normal_f);
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vec3 rtc = reflect( normalize( -eyevector ), normal_f );
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rtc = rtc.x * invsurface[0] + rtc.y * invsurface[1] + rtc.z * invsurface[2];
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rtc = ( m_model * vec4( rtc.xyz, 0.0 ) ).xyz;
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diffuse_f = textureCube(s_cubemap, rtc).rgb * (diffuse_f * 2.5);
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gl_FragColor = fog4(vec4( diffuse_f, 1.0 ));
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}
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#endif
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