151 lines
4.8 KiB
GLSL
151 lines
4.8 KiB
GLSL
/**
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* @file alphaV.glsl
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*
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* $LicenseInfo:firstyear=2007&license=viewerlgpl$
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* Second Life Viewer Source Code
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* Copyright (C) 2007, Linden Research, Inc.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation;
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* version 2.1 of the License only.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*
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* Linden Research, Inc., 945 Battery Street, San Francisco, CA 94111 USA
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* $/LicenseInfo$
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*/
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uniform mat3 normal_matrix;
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uniform mat4 texture_matrix0;
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uniform mat4 modelview_matrix;
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uniform mat4 modelview_projection_matrix;
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ATTRIBUTE vec3 position;
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void passTextureIndex();
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ATTRIBUTE vec3 normal;
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ATTRIBUTE vec4 diffuse_color;
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ATTRIBUTE vec2 texcoord0;
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vec4 calcLighting(vec3 pos, vec3 norm, vec4 color, vec4 baseCol);
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void calcAtmospherics(vec3 inPositionEye);
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float calcDirectionalLight(vec3 n, vec3 l);
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vec3 atmosAmbient(vec3 light);
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vec3 atmosAffectDirectionalLight(float lightIntensity);
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vec3 scaleDownLight(vec3 light);
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vec3 scaleUpLight(vec3 light);
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VARYING vec3 vary_ambient;
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VARYING vec3 vary_directional;
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VARYING vec3 vary_fragcoord;
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VARYING vec3 vary_position;
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VARYING vec3 vary_pointlight_col;
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VARYING vec4 vertex_color;
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VARYING vec2 vary_texcoord0;
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uniform float near_clip;
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uniform float shadow_offset;
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uniform float shadow_bias;
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uniform vec4 light_position[8];
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uniform vec3 light_direction[8];
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uniform vec3 light_attenuation[8];
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uniform vec3 light_diffuse[8];
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float calcDirectionalLight(vec3 n, vec3 l)
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{
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float a = max(dot(n,l),0.0);
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return a;
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}
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float calcPointLightOrSpotLight(vec3 v, vec3 n, vec4 lp, vec3 ln, float la, float fa, float is_pointlight)
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{
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//get light vector
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vec3 lv = lp.xyz-v;
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//get distance
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float d = dot(lv,lv);
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float da = 0.0;
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if (d > 0.0 && la > 0.0 && fa > 0.0)
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{
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//normalize light vector
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lv = normalize(lv);
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//distance attenuation
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float dist2 = d/la;
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da = clamp(1.0-(dist2-1.0*(1.0-fa))/fa, 0.0, 1.0);
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// spotlight coefficient.
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float spot = max(dot(-ln, lv), is_pointlight);
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da *= spot*spot; // GL_SPOT_EXPONENT=2
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//angular attenuation
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da *= max(dot(n, lv), 0.0);
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}
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return da;
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}
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void main()
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{
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//transform vertex
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vec4 vert = vec4(position.xyz, 1.0);
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passTextureIndex();
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vec4 pos = (modelview_matrix * vert);
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gl_Position = modelview_projection_matrix*vec4(position.xyz, 1.0);
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vary_texcoord0 = (texture_matrix0 * vec4(texcoord0,0,1)).xy;
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vec3 norm = normalize(normal_matrix * normal);
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float dp_directional_light = max(0.0, dot(norm, light_position[0].xyz));
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vary_position = pos.xyz + light_position[0].xyz * (1.0-dp_directional_light)*shadow_offset;
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calcAtmospherics(pos.xyz);
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//vec4 color = calcLighting(pos.xyz, norm, diffuse_color, vec4(0.));
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vec4 col = vec4(0.0, 0.0, 0.0, diffuse_color.a);
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// Collect normal lights
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col.rgb += light_diffuse[2].rgb*calcPointLightOrSpotLight(pos.xyz, norm, light_position[2], light_direction[2], light_attenuation[2].x, light_attenuation[2].y, light_attenuation[2].z);
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col.rgb += light_diffuse[3].rgb*calcPointLightOrSpotLight(pos.xyz, norm, light_position[3], light_direction[3], light_attenuation[3].x, light_attenuation[3].y, light_attenuation[3].z);
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col.rgb += light_diffuse[4].rgb*calcPointLightOrSpotLight(pos.xyz, norm, light_position[4], light_direction[4], light_attenuation[4].x, light_attenuation[4].y, light_attenuation[4].z);
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col.rgb += light_diffuse[5].rgb*calcPointLightOrSpotLight(pos.xyz, norm, light_position[5], light_direction[5], light_attenuation[5].x, light_attenuation[5].y, light_attenuation[5].z);
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col.rgb += light_diffuse[6].rgb*calcPointLightOrSpotLight(pos.xyz, norm, light_position[6], light_direction[6], light_attenuation[6].x, light_attenuation[6].y, light_attenuation[6].z);
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col.rgb += light_diffuse[7].rgb*calcPointLightOrSpotLight(pos.xyz, norm, light_position[7], light_direction[7], light_attenuation[7].x, light_attenuation[7].y, light_attenuation[7].z);
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vary_pointlight_col = col.rgb*diffuse_color.rgb;
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col.rgb = vec3(0,0,0);
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// Add windlight lights
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col.rgb = atmosAmbient(vec3(0.));
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vary_ambient = col.rgb*diffuse_color.rgb;
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vary_directional.rgb = diffuse_color.rgb*atmosAffectDirectionalLight(max(calcDirectionalLight(norm, light_position[0].xyz), (1.0-diffuse_color.a)*(1.0-diffuse_color.a)));
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col.rgb = col.rgb*diffuse_color.rgb;
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vertex_color = col;
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pos = modelview_projection_matrix * vert;
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vary_fragcoord.xyz = pos.xyz + vec3(0,0,near_clip);
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}
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