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Change miter threshold to global constant

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Grant Sanderson 2024-08-08 13:55:25 -07:00
parent c345d76de0
commit 9f54b85c4e
1 changed files with 5 additions and 2 deletions
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7
manimlib/shaders/quadratic_bezier_stroke/geom.glsl
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@ -32,6 +32,7 @@ const float COS_THRESHOLD = 0.999;
// Used to determine how many lines to break the curve into // Used to determine how many lines to break the curve into
const float POLYLINE_FACTOR = 100; const float POLYLINE_FACTOR = 100;
const int MAX_STEPS = 32; const int MAX_STEPS = 32;
const float MITER_COS_ANGLE_THRESHOLD = -0.8;
#INSERT emit_gl_Position.glsl #INSERT emit_gl_Position.glsl
#INSERT finalize_color.glsl #INSERT finalize_color.glsl
@ -126,10 +127,12 @@ vec3 step_to_corner(vec3 point, vec3 tangent, vec3 unit_normal, vec4 joint_produ
cos_angle = unit_joint_product(flat_jp).w; cos_angle = unit_joint_product(flat_jp).w;
} }
// If joint type is auto, it will bevel for cos(angle) > -0.7, // If joint type is auto, it will bevel for cos(angle) > MITER_COS_ANGLE_THRESHOLD,
// and smoothly transition to miter for those with sharper angles // and smoothly transition to miter for those with sharper angles
float mcat1 = MITER_COS_ANGLE_THRESHOLD;
float mcat2 = 0.5 * (mcat1 - 1.0);
float miter_factor; float miter_factor;
if (joint_type == AUTO_JOINT) miter_factor = smoothstep(-0.7, -0.9, cos_angle); if (joint_type == AUTO_JOINT) miter_factor = smoothstep(mcat1, mcat2, cos_angle);
else if (joint_type == BEVEL_JOINT) miter_factor = 0.0; else if (joint_type == BEVEL_JOINT) miter_factor = 0.0;
else miter_factor = 1.0; else miter_factor = 1.0;