/usr/share/games/trackballs/shaders/object.vert is in trackballs-data 1.2.4-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 | #version 130
#ifdef GL_ES
precision mediump int;
precision mediump float;
#endif
uniform mat4 proj_matrix;
uniform mat4 model_matrix;
uniform float gameTime;
attribute vec3 in_Position;
attribute vec4 in_Color;
attribute vec2 in_Texcoord;
attribute vec4 in_Normal;
varying vec4 fcolor;
varying vec2 texco;
varying vec3 cpos;
varying vec3 worldpos;
varying vec3 inormal;
varying float flatkey;
void main(void) {
worldpos = in_Position;
vec4 pos = vec4(in_Position.x, in_Position.y, in_Position.z, 1.);
mat4 mvp_matrix = proj_matrix * model_matrix;
gl_Position = mvp_matrix * pos;
cpos = vec4(model_matrix * pos).xyz;
fcolor = in_Color;
texco = 2. * in_Texcoord;
if (distance(in_Normal.xyz, vec3(0.5, 0.5, 0.5)) > 0.1) {
flatkey = 1.0;
} else {
flatkey = -1.0;
}
// As model_matrix M is orthogonal, M = transpose(inverse(M))
inormal = vec4(model_matrix * 2. * vec4(in_Normal.xyz - 0.5, 0.)).xyz;
}
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