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https://github.com/MaurycyLiebner/enve.git
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43 lines
1.3 KiB
GLSL
Executable File
43 lines
1.3 KiB
GLSL
Executable File
// enve - 2D animations software
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// Copyright (C) 2016-2020 Maurycy Liebner
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// This program 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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// 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, see <http://www.gnu.org/licenses/>.
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#version 330 core
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layout(location = 0) out vec4 fragColor;
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in vec2 texCoord;
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uniform sampler2D texture;
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uniform int steps;
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uniform int directions;
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uniform vec2 displacementXY;
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const float PIx2 = 6.28318530718;
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void main(void) {
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vec4 Color = texture2D(texture, texCoord);
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float invStep = 1.0/float(steps);
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for(int i = 0; i < directions; i++) {
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float d = i*PIx2/float(directions);
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vec2 displ = vec2(cos(d), sin(d))*displacementXY;
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for(int j = 1; j <= steps; j++) {
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Color += texture2D(texture, texCoord + displ*j*invStep);
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}
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}
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Color /= float(steps)*float(directions) + 1.0;
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fragColor = Color;
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}
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