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uniform mat4 ViewProjectionMatrix;
uniform mat4 ModelMatrix;
uniform vec3 screenVecs[3];
/* ---- Instantiated Attribs ---- */
in float axis; /* position on the axis. [0.0-1.0] is X axis, [1.0-2.0] is Y, etc... */
in vec2 screenPos;
/* ---- Per instance Attribs ---- */
in vec3 color;
in float size;
in mat4 InstanceModelMatrix;
flat out vec4 finalColor;
void main()
{
float draw_size = 4.0 * size;
vec3 chosen_axis = InstanceModelMatrix[int(axis)].xyz;
vec3 loc = InstanceModelMatrix[3].xyz;
vec3 wpos = loc + chosen_axis * fract(axis) * draw_size;
vec3 spos = screenVecs[0].xyz * screenPos.x + screenVecs[1].xyz * screenPos.y;
/* Scale uniformly by axis length */
spos *= length(chosen_axis) * draw_size;
vec4 pos = vec4(wpos + spos, 1.0);
gl_Position = ViewProjectionMatrix * pos;
finalColor = vec4(color, 1.0);
#ifdef USE_WORLD_CLIP_PLANES
world_clip_planes_calc_clip_distance((ModelMatrix * pos).xyz);
#endif
}
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