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Fix antialiasing issue with straight lines in text

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This commit is contained in:
Grant Sanderson 2022-12-28 16:37:44 -08:00
parent e59b3d2ac0
commit 1180932026
1 changed files with 12 additions and 4 deletions
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16
manimlib/shaders/quadratic_bezier_fill/geom.glsl
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@ -78,12 +78,20 @@ void emit_pentagon(vec3[3] points, vec3 normal){
vec3 p0_perp = cross(t01, normal);
vec3 p2_perp = cross(t12, normal);
bool fill_inside = orientation >= 0.0;
bool fill_inside = orientation > 0.0;
float aaw = anti_alias_width;
vec3 corners[5];
if(fill_inside){
// Note, straight lines will also fall into this case, and since p0_perp and p2_perp
// will point to the right of the curve, it's just what we want
if(bezier_degree == 1.0){
// For straight lines, buff out in both directions
corners = vec3[5](
p0 + aaw * p0_perp,
p0 - aaw * p0_perp,
p1 + 0.5 * aaw * (p0_perp + p2_perp),
p2 - aaw * p2_perp,
p2 + aaw * p2_perp
);
} else if(fill_inside){
// If curved, and filling insight, just buff out away interior
corners = vec3[5](
p0 + aaw * p0_perp,
p0,