42 lines
1.3 KiB
Plaintext
42 lines
1.3 KiB
Plaintext
#version 120
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/*
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Copyright (C) 2010-2017 Kristian Duske
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This file is part of TrenchBroom.
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TrenchBroom 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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TrenchBroom 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 TrenchBroom. If not, see <http://www.gnu.org/licenses/>.
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*/
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uniform bool RenderGrid;
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uniform vec4 GridColor;
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uniform float GridSize;
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uniform float GridAlpha;
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uniform float CameraZoom;
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uniform vec3 Normal;
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varying vec4 modelCoordinates;
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float grid(vec3 coords, vec3 normal, float gridSize, float minGridSize, float lineWidthFactor);
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void main() {
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if (RenderGrid && GridAlpha > 0.0) {
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float minGridSize = 5.0 / CameraZoom;
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float lineWidthFactor = 2.0 / CameraZoom;
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float gridValue = grid(modelCoordinates.xyz, Normal.xyz, GridSize, minGridSize, lineWidthFactor);
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gl_FragColor = vec4(GridColor.xyz, gridValue * GridAlpha);
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}
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}
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