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#pragma BLENDER_REQUIRE(common_view_clipping_lib.glsl)
#pragma BLENDER_REQUIRE(common_view_lib.glsl)
#pragma BLENDER_REQUIRE(common_hair_lib.glsl)
uint outline_colorid_get(void)
{
int flag = int(abs(ObjectInfo.w));
bool is_active = (flag & DRW_BASE_ACTIVE) != 0;
if (isTransform) {
return 0u; /* colorTransform */
}
else if (is_active) {
return 3u; /* colorActive */
}
else {
return 1u; /* colorSelect */
}
return 0u;
}
/* Replace top 2 bits (of the 16bit output) by outlineId.
* This leaves 16K different IDs to create outlines between objects.
vec3 world_pos = point_object_to_world(pos);
* SHIFT = (32 - (16 - 2)) */
#define SHIFT 18u
void main()
{
bool is_persp = (drw_view.winmat[3][3] == 0.0);
float time, thickness;
vec3 center_wpos, tan, binor;
hair_get_center_pos_tan_binor_time(is_persp,
ModelMatrixInverse,
drw_view.viewinv[3].xyz,
drw_view.viewinv[2].xyz,
center_wpos,
tan,
binor,
time,
thickness);
vec3 world_pos;
if (hairThicknessRes > 1) {
/* Calculate the thickness, thicktime, worldpos taken into account the outline. */
float outline_width = point_world_to_ndc(center_wpos).w * 1.25 *
drw_view.viewport_size_inverse.y * drw_view.wininv[1][1];
thickness += outline_width;
float thick_time = float(gl_VertexID % hairThicknessRes) / float(hairThicknessRes - 1);
thick_time = thickness * (thick_time * 2.0 - 1.0);
/* Take object scale into account.
* NOTE: This only works fine with uniform scaling. */
float scale = 1.0 / length(mat3(ModelMatrixInverse) * binor);
world_pos = center_wpos + binor * thick_time * scale;
}
else {
world_pos = center_wpos;
}
gl_Position = point_world_to_ndc(world_pos);
#ifdef USE_GEOM
vert.pos = point_world_to_view(world_pos);
#endif
/* Small bias to always be on top of the geom. */
gl_Position.z -= 1e-3;
/* ID 0 is nothing (background) */
interp.ob_id = uint(resource_handle + 1);
/* Should be 2 bits only [0..3]. */
uint outline_id = outline_colorid_get();
/* Combine for 16bit uint target. */
interp.ob_id = (outline_id << 14u) | ((interp.ob_id << SHIFT) >> SHIFT);
view_clipping_distances(world_pos);
}
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