public-mirrors/3b1b-manim
1
0
Fork 0
mirror of https://github.com/3b1b/manim.git synced 2025-04-13 09:47:07 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions

Temporary band-aide for degenerate normal vector calculations

Browse source 
This solution is a bit too specific to the case of spheres.
This commit is contained in:
Grant Sanderson 2024-11-25 12:39:32 -07:00
parent dd51b696e5
commit fbce0b132c
1 changed files with 8 additions and 2 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

10
manimlib/shaders/surface/vert.glsl
View file

@ -11,8 +11,14 @@ out vec4 v_color;
#INSERT get_unit_normal.glsl
#INSERT finalize_color.glsl
const float EPSILON = 1e-10;
void main(){
emit_gl_Position(point);
vec3 normal = cross(normalize(du_point - point), normalize(dv_point - point));
v_color = finalize_color(rgba, point, normalize(normal));
vec3 du = (du_point - point);
vec3 dv = (dv_point - point);
vec3 normal = cross(du, dv);
float mag = length(normal);
vec3 unit_normal = (mag < EPSILON) ? vec3(0, 0, sign(point.z)) : normal / mag;
v_color = finalize_color(rgba, point, unit_normal);
}