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#version 120
// Copyright © 2013-2015, 2017 B. Clausius <barcc@gmx.de>
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
attribute vec4 vertex_attr;
attribute vec3 normal_attr;
attribute vec3 color_attr;
attribute vec2 texcoord_attr;
attribute vec3 barycentric_attr;
varying vec4 position;
varying vec3 normal;
varying vec3 color;
varying vec2 texcoord;
varying vec3 barycentric;
uniform mat4 projection;
uniform mat4 modelview;
uniform mat4 object;
const vec3 gamma = vec3(2.2);
void main()
{
position = modelview * (object * vertex_attr);
gl_Position = projection * position;
// actually we need here the inverse transpose of the matrix (modelview*object),
// but the mat3 parts are pure rotations, where the inverse is equal to the transpose
normal = mat3(modelview) * (mat3(object) * normal_attr);
color = pow(color_attr, gamma);
texcoord = texcoord_attr;
barycentric = barycentric_attr;
}
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