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Fix precision in physics supports generation

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Lower threshold for dot was (1.0 - threshold) which is incorrect.
Patch changes it to correct version sqrt(1.0 - threshold * threshold)

Co-authored-by: Ricardo Buring <ricardo.buring@gmail.com>
This commit is contained in:
Black-Cat 2023-04-23 19:03:19 +01:00
parent 9f12e7b52d
commit d710af2e97
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GPG key ID: E27FCF764B31003B
3 changed files with 25 additions and 23 deletions
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9
servers/physics_2d/godot_shape_2d.h
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@ -32,7 +32,6 @@
#define GODOT_SHAPE_2D_H
#include "servers/physics_server_2d.h"
#define _SEGMENT_IS_VALID_SUPPORT_THRESHOLD 0.99998
class GodotShape2D;
@ -53,6 +52,10 @@ class GodotShape2D {
HashMap<GodotShapeOwner2D *, int> owners;
protected:
const double segment_is_valid_support_threshold = 0.99998;
const double segment_is_valid_support_threshold_lower =
Math::sqrt(1.0 - segment_is_valid_support_threshold * segment_is_valid_support_threshold);
void configure(const Rect2 &p_aabb);
public:
@ -95,7 +98,7 @@ public:
}
if (r_amount == 1) {
if (Math::abs(p_normal.dot(p_cast.normalized())) < (1.0 - _SEGMENT_IS_VALID_SUPPORT_THRESHOLD)) {
if (Math::abs(p_normal.dot(p_cast.normalized())) < segment_is_valid_support_threshold_lower) {
//make line because they are parallel
r_amount = 2;
r_supports[1] = r_supports[0] + p_cast;
@ -105,7 +108,7 @@ public:
}
} else {
if (Math::abs(p_normal.dot(p_cast.normalized())) < (1.0 - _SEGMENT_IS_VALID_SUPPORT_THRESHOLD)) {
if (Math::abs(p_normal.dot(p_cast.normalized())) < segment_is_valid_support_threshold_lower) {
//optimize line and make it larger because they are parallel
if ((r_supports[1] - r_supports[0]).dot(p_cast) > 0) {
//larger towards 1