diff options
Diffstat (limited to 'examples/physics_forces.c')
| -rw-r--r-- | examples/physics_forces.c | 40 |
1 files changed, 31 insertions, 9 deletions
diff --git a/examples/physics_forces.c b/examples/physics_forces.c index 2afd14ee..74b40d57 100644 --- a/examples/physics_forces.c +++ b/examples/physics_forces.c @@ -12,9 +12,12 @@ #include "raylib.h" #include "math.h" -#define FORCE_AMOUNT 5.0f -#define FORCE_RADIUS 150 -#define LINE_LENGTH 100 +#define FORCE_AMOUNT 5.0f +#define FORCE_RADIUS 150 +#define LINE_LENGTH 75 +#define TRIANGLE_LENGTH 12 + +void DrawRigidbodyCircle(PhysicObject *obj, Color color); int main() { @@ -42,6 +45,7 @@ int main() } // Create circles physic objects + // NOTE: when creating circle physic objects, transform.scale must be { 0, 0 } and object radius must be defined in collider.radius and use this value to draw the circle. PhysicObject *circles[3]; for (int i = 0; i < 3; i++) { @@ -111,14 +115,23 @@ int main() // Draw force radius DrawCircleLines(mousePosition.x, mousePosition.y, FORCE_RADIUS, BLACK); - // Draw direction line + // Draw direction lines if (CheckCollisionPointCircle((Vector2){ rectangles[i]->transform.position.x + rectangles[i]->transform.scale.x/2, rectangles[i]->transform.position.y + rectangles[i]->transform.scale.y/2 }, mousePosition, FORCE_RADIUS)) { Vector2 direction = { rectangles[i]->transform.position.x + rectangles[i]->transform.scale.x/2 - mousePosition.x, rectangles[i]->transform.position.y + rectangles[i]->transform.scale.y/2 - mousePosition.y }; float angle = atan2l(direction.y, direction.x); - DrawLineV((Vector2){ rectangles[i]->transform.position.x + rectangles[i]->transform.scale.x/2, rectangles[i]->transform.position.y + rectangles[i]->transform.scale.y/2 }, - (Vector2){ rectangles[i]->transform.position.x + rectangles[i]->transform.scale.x/2 + (cos(angle)*LINE_LENGTH), rectangles[i]->transform.position.y + rectangles[i]->transform.scale.y/2 + (sin(angle)*LINE_LENGTH) }, BLACK); + // Calculate arrow start and end positions + Vector2 startPosition = { rectangles[i]->transform.position.x + rectangles[i]->transform.scale.x/2, rectangles[i]->transform.position.y + rectangles[i]->transform.scale.y/2 }; + Vector2 endPosition = { rectangles[i]->transform.position.x + rectangles[i]->transform.scale.x/2 + (cos(angle)*LINE_LENGTH), rectangles[i]->transform.position.y + rectangles[i]->transform.scale.y/2 + (sin(angle)*LINE_LENGTH) }; + + // Draw arrow line + DrawLineV(startPosition, endPosition, BLACK); + + // Draw arrow triangle + DrawTriangleLines((Vector2){ endPosition.x - cos(angle + 90*DEG2RAD)*LINE_LENGTH/TRIANGLE_LENGTH, endPosition.y - sin(angle + 90*DEG2RAD)*LINE_LENGTH/TRIANGLE_LENGTH }, + (Vector2){ endPosition.x + cos(angle + 90*DEG2RAD)*LINE_LENGTH/TRIANGLE_LENGTH, endPosition.y + sin(angle + 90*DEG2RAD)*LINE_LENGTH/TRIANGLE_LENGTH }, + (Vector2){ endPosition.x + cos(angle)*LINE_LENGTH/TRIANGLE_LENGTH*2, endPosition.y + sin(angle)*LINE_LENGTH/TRIANGLE_LENGTH*2 }, BLACK); } } @@ -131,14 +144,23 @@ int main() // Draw force radius DrawCircleLines(mousePosition.x, mousePosition.y, FORCE_RADIUS, BLACK); - // Draw direction line + // Draw direction lines if (CheckCollisionPointCircle((Vector2){ circles[i]->transform.position.x, circles[i]->transform.position.y }, mousePosition, FORCE_RADIUS)) { Vector2 direction = { circles[i]->transform.position.x - mousePosition.x, circles[i]->transform.position.y - mousePosition.y }; float angle = atan2l(direction.y, direction.x); - DrawLineV((Vector2){ circles[i]->transform.position.x, circles[i]->transform.position.y }, - (Vector2){ circles[i]->transform.position.x + (cos(angle)*LINE_LENGTH), circles[i]->transform.position.y + (sin(angle)*LINE_LENGTH) }, BLACK); + // Calculate arrow start and end positions + Vector2 startPosition = { circles[i]->transform.position.x, circles[i]->transform.position.y }; + Vector2 endPosition = { circles[i]->transform.position.x + (cos(angle)*LINE_LENGTH), circles[i]->transform.position.y + (sin(angle)*LINE_LENGTH) }; + + // Draw arrow line + DrawLineV(startPosition, endPosition, BLACK); + + // Draw arrow triangle + DrawTriangleLines((Vector2){ endPosition.x - cos(angle + 90*DEG2RAD)*LINE_LENGTH/TRIANGLE_LENGTH, endPosition.y - sin(angle + 90*DEG2RAD)*LINE_LENGTH/TRIANGLE_LENGTH }, + (Vector2){ endPosition.x + cos(angle + 90*DEG2RAD)*LINE_LENGTH/TRIANGLE_LENGTH, endPosition.y + sin(angle + 90*DEG2RAD)*LINE_LENGTH/TRIANGLE_LENGTH }, + (Vector2){ endPosition.x + cos(angle)*LINE_LENGTH/TRIANGLE_LENGTH*2, endPosition.y + sin(angle)*LINE_LENGTH/TRIANGLE_LENGTH*2 }, BLACK); } } |