58 lines
1.5 KiB
GLSL
58 lines
1.5 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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uniform mat4 projectionViewMatrix;
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uniform mat4 viewMatrix;
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uniform vec3 rightVector;
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uniform vec3 upVector;
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uniform vec3 viewOriginVector;
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uniform float fogDistance;
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attribute vec3 positionAttribute;
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attribute vec2 texCoordAttribute;
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attribute vec4 colorAttribute;
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varying vec4 color;
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varying vec2 texCoord;
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varying vec4 fogDensity;
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vec4 FogDensity(float poweredLength);
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void main() {
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vec3 pos = positionAttribute.xyz;
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gl_Position = projectionViewMatrix * vec4(pos,1.);
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color = colorAttribute;
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texCoord = texCoordAttribute;
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// fog.
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// FIXME: cannot gamma correct because sprite may be
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// alpha-blended.
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vec4 viewPos = viewMatrix * vec4(pos,1.);
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vec2 horzRelativePos = pos.xy - viewOriginVector.xy;
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float horzDistance = dot(horzRelativePos, horzRelativePos);
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fogDensity = FogDensity(horzDistance);
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}
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