55 lines
1.6 KiB
Plaintext
55 lines
1.6 KiB
Plaintext
/*
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oolite-default-atmosphere.vertex
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Default vertex shader for Oolite's NEW_PLANETS
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© 2009–2013 Jens Ayton
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; either version 2
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of the License, or (at your option) any later version.
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This program 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 this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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MA 02110-1301, USA.
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*/
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// No vNormal, because normal is always 0,0,1 in tangent space.
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uniform mat3 ooliteNormalMatrix;
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uniform mat4 ooliteModelView;
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uniform mat4 ooliteModelViewProjection;
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varying vec3 vEyeVector;
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varying vec2 vTexCoords;
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varying vec3 vLight1Vector;
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varying vec3 vCoords;
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void main(void)
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{
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vCoords = gl_Vertex.xyz;
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// Build tangent basis.
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vec3 normal = normalize(ooliteNormalMatrix * gl_Normal);
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vec3 binormal = normalize(cross(normal, ooliteNormalMatrix * vec3(0, 1, 0)));
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vec3 tangent = -cross(normal, binormal);
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mat3 TBN = mat3(tangent, binormal, normal);
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vec3 eyeVector = -vec3(ooliteModelView * gl_Vertex);
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vEyeVector = eyeVector * TBN;
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vec3 light1Vector = gl_LightSource[1].position.xyz + eyeVector;
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vLight1Vector = light1Vector * TBN;
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vTexCoords = gl_MultiTexCoord0.st;
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gl_Position = ooliteModelViewProjection * gl_Vertex;
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}
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