31a153e711
This commit adds new model rendering options
`ModelRenderParam::{ghost, opacity}`.
> Specifies that the model is not an actual object in the virtual world,
> thus does not affect the shading of other objects and does not appear
> in a mirror.
> ...
> In exchange, it allows the use of an opacity value other than `1`.
86 lines
2.1 KiB
GLSL
86 lines
2.1 KiB
GLSL
/*
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Copyright (c) 2013 yvt
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This file is part of OpenSpades.
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OpenSpades is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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OpenSpades 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
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with OpenSpades. If not, see <http://www.gnu.org/licenses/>.
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*/
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varying vec4 textureCoord;
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//varying vec2 detailCoord;
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varying vec3 fogDensity;
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varying float flatShading;
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uniform sampler2D ambientOcclusionTexture;
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uniform sampler2D modelTexture;
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uniform vec3 fogColor;
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uniform vec3 customColor;
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uniform float modelOpacity;
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vec3 EvaluateSunLight();
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vec3 EvaluateAmbientLight(float detailAmbientOcclusion);
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void main() {
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vec4 texData = texture2D(modelTexture, textureCoord.xy);
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// model color
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gl_FragColor = vec4(texData.xyz, 1.);
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if(dot(gl_FragColor.xyz, vec3(1.)) < 0.0001){
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gl_FragColor.xyz = customColor;
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}
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// ambient occlusion
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float aoID = texData.w * (255. / 256.);
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float aoY = aoID * 16.;
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float aoX = fract(aoY);
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aoY = floor(aoY) / 16.;
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vec2 ambientOcclusionCoord = vec2(aoX, aoY);
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ambientOcclusionCoord += fract(textureCoord.zw) *
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(15. / 256.);
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ambientOcclusionCoord += .5 / 256.;
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// Emissive material flag is encoded in AOID
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bool isEmissive = texData.w == 1.0;
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// linearize
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gl_FragColor.xyz *= gl_FragColor.xyz;
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// shading
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vec3 shading = vec3(flatShading);
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shading *= EvaluateSunLight();
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vec3 ao = texture2D(ambientOcclusionTexture, ambientOcclusionCoord).xyz;
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shading += EvaluateAmbientLight(ao.x);
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if (!isEmissive) {
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gl_FragColor.xyz *= shading;
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}
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gl_FragColor.xyz = mix(gl_FragColor.xyz, fogColor, fogDensity);
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#if !LINEAR_FRAMEBUFFER
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gl_FragColor.xyz = sqrt(gl_FragColor.xyz);
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#endif
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// Only valid in the ghost pass - Blending is disabled for most models
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gl_FragColor.w = modelOpacity;
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}
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