72 lines
1.5 KiB
GLSL
72 lines
1.5 KiB
GLSL
|
|
in vec3 pos;
|
|
in float color;
|
|
|
|
out vec4 finalColor;
|
|
#ifdef USE_POINTS
|
|
out vec2 radii;
|
|
#endif
|
|
|
|
vec3 weight_to_rgb(float weight)
|
|
{
|
|
vec3 r_rgb;
|
|
float blend = ((weight / 2.0) + 0.5);
|
|
|
|
if (weight <= 0.25) { /* blue->cyan */
|
|
r_rgb[0] = 0.0;
|
|
r_rgb[1] = blend * weight * 4.0;
|
|
r_rgb[2] = blend;
|
|
}
|
|
else if (weight <= 0.50) { /* cyan->green */
|
|
r_rgb[0] = 0.0;
|
|
r_rgb[1] = blend;
|
|
r_rgb[2] = blend * (1.0 - ((weight - 0.25) * 4.0));
|
|
}
|
|
else if (weight <= 0.75) { /* green->yellow */
|
|
r_rgb[0] = blend * ((weight - 0.50) * 4.0);
|
|
r_rgb[1] = blend;
|
|
r_rgb[2] = 0.0;
|
|
}
|
|
else if (weight <= 1.0) { /* yellow->red */
|
|
r_rgb[0] = blend;
|
|
r_rgb[1] = blend * (1.0 - ((weight - 0.75) * 4.0));
|
|
r_rgb[2] = 0.0;
|
|
}
|
|
else {
|
|
/* exceptional value, unclamped or nan,
|
|
* avoid uninitialized memory use */
|
|
r_rgb[0] = 1.0;
|
|
r_rgb[1] = 0.0;
|
|
r_rgb[2] = 1.0;
|
|
}
|
|
|
|
return r_rgb;
|
|
}
|
|
|
|
void main()
|
|
{
|
|
vec3 world_pos = point_object_to_world(pos);
|
|
gl_Position = point_world_to_ndc(world_pos);
|
|
|
|
#ifdef USE_WEIGHT
|
|
finalColor = vec4(weight_to_rgb(color), 1.0);
|
|
#else
|
|
finalColor = mix(colorWire, colorEdgeSelect, color);
|
|
#endif
|
|
|
|
#ifdef USE_POINTS
|
|
float size = sizeVertex * 2.0;
|
|
gl_PointSize = size;
|
|
|
|
/* calculate concentric radii in pixels */
|
|
float radius = sizeVertex;
|
|
|
|
/* start at the outside and progress toward the center */
|
|
radii[0] = radius;
|
|
radii[1] = radius - 1.0;
|
|
|
|
/* convert to PointCoord units */
|
|
radii /= size;
|
|
#endif
|
|
}
|