Bug
I found this bug when creating single colored Disk3D objects. Despite constructing it with some arbitrary color with default parameters the disk appears completely black:
dsk1 = Disk3D(v_range=[PI, 1.5 * PI], radius=bevel, color=GREY)
The shader being used is the default for an arbitrary Surface object.
shaders/surface/vert.glsl:
#version 330
in vec3 point;
in vec3 d_normal_point;
in vec4 rgba;
out vec4 v_color;
#INSERT emit_gl_Position.glsl
#INSERT get_unit_normal.glsl
#INSERT finalize_color.glsl
const float EPSILON = 1e-10;
void main(){
emit_gl_Position(point);
vec3 unit_normal = normalize(d_normal_point - point);
v_color = finalize_color(rgba, point, unit_normal);
}This issue is similar to #2324 because I figured that when one increases the uv resolution from the default of (2,100) for disks to, say, (10,100) the black spot concentrates near the center where normalize(d_normal_point - point) fails. Using a higher u resolution with the following check confirms this:
void main(){
emit_gl_Position(point);
vec3 unit_normal = d_normal_point - point;
float len = length(unit_normal);
if (len == 0) {
v_color = vec4(0,0,0,1);
return;
} else {
unit_normal = normalize(d_normal_point - point);
}
v_color = finalize_color(rgba, point, unit_normal);
}
Bug
I found this bug when creating single colored
Disk3Dobjects. Despite constructing it with some arbitrary color with default parameters the disk appears completely black:The shader being used is the default for an arbitrary
Surfaceobject.shaders/surface/vert.glsl:This issue is similar to #2324 because I figured that when one increases the uv resolution from the default of
(2,100)for disks to, say,(10,100)the black spot concentrates near the center wherenormalize(d_normal_point - point)fails. Using a higher u resolution with the following check confirms this: