31 lines
952 B
GLSL
31 lines
952 B
GLSL
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/*
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* Copyright 2016 The Cartographer Authors
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#version 120
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varying vec2 out_submap_texture_coordinate;
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uniform sampler2D u_submap;
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uniform float u_alpha;
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void main()
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{
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vec2 texture_value = texture2D(u_submap, out_submap_texture_coordinate).rg;
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float value = u_alpha * texture_value.r;
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float alpha = u_alpha * texture_value.g;
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gl_FragColor = vec4(value, value, value, alpha);
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}
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