36 lines
1 KiB
GLSL
36 lines
1 KiB
GLSL
/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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/*
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* This file is part of the LibreOffice project.
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/.
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*/
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#version 120
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#define M_PI 3.1415926535897932384626433832795
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uniform sampler2D leavingSlideTexture;
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uniform sampler2D enteringSlideTexture;
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varying vec2 v_texturePosition;
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varying vec3 v_normal;
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uniform float time;
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varying float angle;
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void main() {
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vec3 lightVector = vec3(0.0, 0.0, 1.0);
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float light = dot(lightVector, v_normal);
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vec4 fragment;
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if (angle < M_PI)
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fragment = texture2D(leavingSlideTexture, v_texturePosition);
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else
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fragment = texture2D(enteringSlideTexture, v_texturePosition);
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vec4 black = vec4(0.0, 0.0, 0.0, fragment.a);
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gl_FragColor = mix(black, fragment, max(light, 0.0));
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}
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/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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