public-mirrors/3b1b-manim
1
0
Fork 0
mirror of https://github.com/3b1b/manim.git synced 2025-08-05 16:49:03 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions

Fix kink issue in flat stroke

Browse source
This commit is contained in:
Grant Sanderson 2024-08-06 10:41:31 -05:00
parent 44ec9933b7
commit ec88673e92
1 changed files with 2 additions and 2 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

4
manimlib/shaders/quadratic_bezier_stroke/geom.glsl
View file

@ -116,7 +116,7 @@ vec3 step_to_corner(vec3 point, vec3 tangent, vec3 unit_normal, vec4 joint_produ
if(cos_angle > 1 - 1e-5) return step;
// Adjust based on the joint
float sin_angle = length(unit_jp.xyz) * sign(unit_jp.z);
float sin_angle = length(unit_jp.xyz) * sign(dot(unit_jp.xyz, unit_normal));
float shift = (int(joint_type) == MITER_JOINT) ?
(cos_angle + 1.0) / sin_angle :
(cos_angle - 1.0) / sin_angle;
@ -144,7 +144,7 @@ void emit_point_with_width(
normalize(to_camera) :
get_joint_unit_normal(joint_product);
// Choose the "outward" normal direction
if(to_camera.z * dot(unit_normal, to_camera) < 0) unit_normal *= -1;
unit_normal *= sign(dot(unit_normal, to_camera));
// Figure out the step from the point to the corners of the
// triangle strip around the polyline