/** * @file spotLightF.glsl * * Copyright (c) 2007-$CurrentYear$, Linden Research, Inc. * $License$ */ #version 120 #extension GL_ARB_texture_rectangle : enable uniform sampler2DRect diffuseRect; uniform sampler2DRect specularRect; uniform sampler2DRect depthMap; uniform sampler2DRect normalMap; uniform samplerCube environmentMap; uniform sampler2DRect lightMap; uniform sampler2D noiseMap; uniform sampler2D lightFunc; uniform sampler2D projectionMap; uniform mat4 proj_mat; //screen space to light space uniform float proj_near; //near clip for projection uniform vec3 proj_p; //plane projection is emitting from (in screen space) uniform vec3 proj_n; uniform float proj_focus; //distance from plane to begin blurring uniform float proj_lod; //(number of mips in proj map) uniform float proj_range; //range between near clip and far clip plane of projection uniform float proj_ambiance; uniform float near_clip; uniform float far_clip; uniform vec3 proj_origin; //origin of projection to be used for angular attenuation uniform float sun_wash; uniform int proj_shadow_idx; uniform float shadow_fade; varying vec4 vary_light; varying vec4 vary_fragcoord; uniform vec2 screen_res; uniform mat4 inv_proj; vec4 getPosition(vec2 pos_screen) { float depth = texture2DRect(depthMap, pos_screen.xy).a; vec2 sc = pos_screen.xy*2.0; sc /= screen_res; sc -= vec2(1.0,1.0); vec4 ndc = vec4(sc.x, sc.y, 2.0*depth-1.0, 1.0); vec4 pos = inv_proj * ndc; pos /= pos.w; pos.w = 1.0; return pos; } void main() { vec4 frag = vary_fragcoord; frag.xyz /= frag.w; frag.xyz = frag.xyz*0.5+0.5; frag.xy *= screen_res; float shadow = 1.0; if (proj_shadow_idx >= 0) { vec4 shd = texture2DRect(lightMap, frag.xy); float sh[2]; sh[0] = shd.b; sh[1] = shd.a; shadow = min(sh[proj_shadow_idx]+shadow_fade, 1.0); } vec3 pos = getPosition(frag.xy).xyz; vec3 lv = vary_light.xyz-pos.xyz; float dist2 = dot(lv,lv); dist2 /= vary_light.w; if (dist2 > 1.0) { discard; } vec3 norm = texture2DRect(normalMap, frag.xy).xyz*2.0-1.0; norm = normalize(norm); float l_dist = -dot(lv, proj_n); vec4 proj_tc = (proj_mat * vec4(pos.xyz, 1.0)); if (proj_tc.z < 0.0) { discard; } proj_tc.xyz /= proj_tc.w; float fa = gl_Color.a+1.0; float dist_atten = clamp(1.0-(dist2-1.0*(1.0-fa))/fa, 0.0, 1.0); lv = proj_origin-pos.xyz; lv = normalize(lv); float da = dot(norm, lv); vec3 col = vec3(0,0,0); vec3 diff_tex = texture2DRect(diffuseRect, frag.xy).rgb; float noise = texture2D(noiseMap, frag.xy/128.0).b; if (proj_tc.z > 0.0 && proj_tc.x < 1.0 && proj_tc.y < 1.0 && proj_tc.x > 0.0 && proj_tc.y > 0.0) { float lit = 0.0; if (da > 0.0) { float diff = clamp((l_dist-proj_focus)/proj_range, 0.0, 1.0); float lod = diff * proj_lod; vec4 plcol = texture2DLod(projectionMap, proj_tc.xy, lod); vec3 lcol = gl_Color.rgb * plcol.rgb * plcol.a; lit = da * dist_atten * noise; col = lcol*lit*diff_tex*shadow; } float diff = clamp((proj_range-proj_focus)/proj_range, 0.0, 1.0); float lod = diff * proj_lod; vec4 amb_plcol = texture2DLod(projectionMap, proj_tc.xy, lod); //float amb_da = mix(proj_ambiance, proj_ambiance*max(-da, 0.0), max(da, 0.0)); float amb_da = proj_ambiance; if (da > 0.0) { amb_da += (da*0.5)*(1.0-shadow)*proj_ambiance; } amb_da += (da*da*0.5+0.5)*proj_ambiance; amb_da *= dist_atten * noise; amb_da = min(amb_da, 1.0-lit); col += amb_da*gl_Color.rgb*diff_tex.rgb*amb_plcol.rgb*amb_plcol.a; } vec4 spec = texture2DRect(specularRect, frag.xy); if (spec.a > 0.0) { vec3 ref = reflect(normalize(pos), norm); //project from point pos in direction ref to plane proj_p, proj_n vec3 pdelta = proj_p-pos; float ds = dot(ref, proj_n); if (ds < 0.0) { vec3 pfinal = pos + ref * dot(pdelta, proj_n)/ds; vec3 stc = (proj_mat * vec4(pfinal.xyz, 1.0)).xyz; if (stc.z > 0.0) { stc.xy /= stc.z+proj_near; if (stc.x < 1.0 && stc.y < 1.0 && stc.x > 0.0 && stc.y > 0.0) { vec4 scol = texture2DLod(projectionMap, stc.xy, proj_lod-spec.a*proj_lod); col += dist_atten*scol.rgb*gl_Color.rgb*scol.a*spec.rgb*shadow; } } } } //attenuate point light contribution by SSAO component col *= texture2DRect(lightMap, frag.xy).g; gl_FragColor.rgb = col; gl_FragColor.a = 0.0; }