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