109 lines
2.6 KiB
GLSL
109 lines
2.6 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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// Lightgrid-lit surface, normalmap alpha contains specularity & reflectivity.
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//==============================================================================
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!!ver 110
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!!permu FRAMEBLEND
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!!permu FOG
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!!permu SKELETAL
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!!cvarf gl_specular
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!!samps diffuse normalmap reflectcube
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!!permu FAKESHADOWS
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!!cvardf r_glsl_pcf
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!!samps =FAKESHADOWS shadowmap
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!!cvardf r_skipDiffuse
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!!cvardf r_skipNormal
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!!cvardf r_skipSpecular
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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 vec3 norm;
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varying mat3 invsurface;
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#ifdef FAKESHADOWS
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varying vec4 vtexprojcoord;
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#endif
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#ifdef VERTEX_SHADER
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#include "sys/skeletal.h"
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void main ()
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{
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vec3 n, s, t, w;
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gl_Position = skeletaltransform_wnst(w,n,s,t);
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norm = n;
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n = normalize(n);
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s = normalize(s);
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t = normalize(t);
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tex_c = v_texcoord;
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/* normalmap */
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invsurface = mat3(s, t, n);
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/* reflect */
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eyevector = e_eyepos - w.xyz;
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#ifdef FAKESHADOWS
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vtexprojcoord = (l_cubematrix*vec4(v_position.xyz, 1.0));
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#endif
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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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#include "sys/pcf.h"
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float lambert(vec3 normal, vec3 dir)
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{
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return max(dot(normal, dir), 0.0);
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}
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float halflambert(vec3 normal, vec3 dir)
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{
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return (lambert(normal, dir) * 0.5) + 0.5;
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}
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void main ()
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{
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vec3 cube_c;
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vec4 diffuse_f = texture2D( s_diffuse, tex_c );
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vec3 normal_f = (texture2D(s_normalmap, tex_c).rgb - 0.5) * 2.0;
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float gloss = texture2D( s_normalmap, tex_c ).a;
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vec3 new_e_light_dir = vec3(cos(e_time), sin(e_time), 0);
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vec3 light;
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#ifdef HALFLAMBERT
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light = e_light_ambient + (e_light_mul * halflambert(norm, e_light_dir));
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#else
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light = e_light_ambient + (e_light_mul * lambert(norm, e_light_dir));
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#endif
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#if r_skipSpecular==0
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// gloss pass
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vec3 halfdir = normalize(normalize(eyevector) + e_light_dir);
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vec3 bumps = normalize(invsurface * (normal_f));
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float spec = pow(max(dot(halfdir, bumps), 0.0), FTE_SPECULAR_EXPONENT);
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spec *= 5.0 * (1.0 - gloss);
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diffuse_f.rgb += spec;
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// envmap pass
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cube_c = reflect(normalize(-eyevector), normal_f.rgb * 0.5);
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cube_c = cube_c.x * invsurface[0] + cube_c.y * invsurface[1] + cube_c.z * invsurface[2];
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cube_c = (m_model * vec4(cube_c.xyz, 0.0)).xyz;
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diffuse_f.rgb = mix(textureCube(s_reflectcube, cube_c).rgb, diffuse_f.rgb, gloss);
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#endif
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diffuse_f.rgb *= light;
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#ifdef FAKESHADOWS
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diffuse_f.rgb *= ShadowmapFilter(s_shadowmap, vtexprojcoord);
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#endif
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gl_FragColor = fog4( diffuse_f * e_colourident ) * e_lmscale;
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}
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#endif
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