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#version 130
#ifdef GL_ES
precision mediump int;
precision mediump float;
#endif
uniform mat4 mvp_matrix;
uniform mat4 model_matrix;
uniform float gameTime;
attribute vec3 in_Position;
attribute vec4 in_Color;
attribute vec4 in_Texcoord;
attribute vec4 in_Normal;
attribute vec2 in_Velocity;
varying vec4 fcolor;
varying vec3 texco;
varying vec3 cpos;
varying vec3 inormal;
varying float flatkey;
varying vec3 worldpos;
void main(void) {
worldpos = in_Position;
vec4 pos = vec4(in_Position.x, in_Position.y, in_Position.z, 1.);
gl_Position = mvp_matrix * pos;
cpos = vec4(model_matrix * pos).xyz;
fcolor = in_Color;
vec2 vel = mod(-gameTime * in_Velocity, 1.);
texco = vec3(vec2(in_Texcoord.xy + vel).xy, in_Texcoord.z);
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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