121 lines
2.8 KiB
GLSL
121 lines
2.8 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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// Terrain shader used for skyroom surfaces.
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//==============================================================================
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!!ver 110
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!!permu FOG
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!!permu BUMP
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!!permu DELUXE
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!!samps 4 diffuse
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!!samps lightmap
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!!samps =LIGHTSTYLED lightmap1 lightmap2 lightmap3
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!!samps =DELUXE deluxemap
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!!samps =LIGHTSTYLED =DELUXE deluxemap1 deluxemap2 deluxemap3
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!!cvardf r_skipLightmap
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#include "sys/defs.h"
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#include "sys/fog.h"
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varying vec2 tex_c;
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varying vec4 vex_color;
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varying vec2 lm0;
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#ifdef LIGHTSTYLED
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varying vec2 lm1, lm2, lm3;
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#endif
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#ifdef VERTEX_SHADER
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void lightmapped_init(void)
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{
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lm0 = v_lmcoord;
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#ifdef LIGHTSTYLED
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lm1 = v_lmcoord2;
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lm2 = v_lmcoord3;
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lm3 = v_lmcoord4;
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#endif
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}
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void main ()
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{
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tex_c = v_texcoord;
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lm_c = v_lmcoord;
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vex_color = v_colour;
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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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vec3 lightmap_fragment()
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{
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vec3 lightmaps;
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#if r_skipLightmap==0
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#ifdef LIGHTSTYLED
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#define LIGHTMAP0 texture2D(s_lightmap0, lm0).rgb
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#define LIGHTMAP1 texture2D(s_lightmap1, lm1).rgb
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#define LIGHTMAP2 texture2D(s_lightmap2, lm2).rgb
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#define LIGHTMAP3 texture2D(s_lightmap3, lm3).rgb
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#else
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#define LIGHTMAP texture2D(s_lightmap, lm0).rgb
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#endif
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#else
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#ifdef LIGHTSTYLED
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#define LIGHTMAP0 vec3(0.5,0.5,0.5)
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#define LIGHTMAP1 vec3(0.5,0.5,0.5)
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#define LIGHTMAP2 vec3(0.5,0.5,0.5)
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#define LIGHTMAP3 vec3(0.5,0.5,0.5)
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#else
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#define LIGHTMAP vec3(0.5,0.5,0.5)
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#endif
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#endif
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vec3 lightmap_fragment()
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{
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vec3 lightmaps;
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#ifdef LIGHTSTYLED
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lightmaps = LIGHTMAP0 * e_lmscale[0].rgb;
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lightmaps += LIGHTMAP1 * e_lmscale[1].rgb;
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lightmaps += LIGHTMAP2 * e_lmscale[2].rgb;
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lightmaps += LIGHTMAP3 * e_lmscale[3].rgb;
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#else
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lightmaps = LIGHTMAP * e_lmscale.rgb;
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#endif
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return lightmaps;
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}
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#if r_skipNormal==0
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vec3 lightmap_fragment(vec3 normal_f)
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{
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#ifndef DELUXE
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return lightmap_fragment();
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#else
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vec3 lightmaps;
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#if defined(LIGHTSTYLED)
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lightmaps = LIGHTMAP0 * e_lmscale[0].rgb * dot(normal_f, (texture2D(s_deluxemap0, lm0).rgb - 0.5) * 2.0);
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lightmaps += LIGHTMAP1 * e_lmscale[1].rgb * dot(normal_f, (texture2D(s_deluxemap1, lm1).rgb - 0.5) * 2.0);
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lightmaps += LIGHTMAP2 * e_lmscale[2].rgb * dot(normal_f, (texture2D(s_deluxemap2, lm2).rgb - 0.5) * 2.0);
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lightmaps += LIGHTMAP3 * e_lmscale[3].rgb * dot(normal_f, (texture2D(s_deluxemap3, lm3).rgb - 0.5) * 2.0);
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#else
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lightmaps = LIGHTMAP * e_lmscale.rgb * dot(normal_f, (texture2D(s_deluxemap, lm0).rgb - 0.5) * 2.0);
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#endif
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return lightmaps;
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#endif
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}
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#endif
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void main ()
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{
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vec4 diff1_f = texture2D( s_t0, tex_c );
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vec4 diff2_f = texture2D( s_t1, tex_c );
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vec3 output_f = mix( diff1_f.rgb, diff2_f.rgb, vex_color.a ) * lightmap_fragment(normal_f);
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gl_FragColor = fog4( vec4( output_f.rgb, 1.0 ) );
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}
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#endif
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