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-rw-r--r--src/main/engine/shape/circle.c17
1 files changed, 17 insertions, 0 deletions
diff --git a/src/main/engine/shape/circle.c b/src/main/engine/shape/circle.c
index 9cc79c6..f60e917 100644
--- a/src/main/engine/shape/circle.c
+++ b/src/main/engine/shape/circle.c
@@ -18,6 +18,8 @@
*/
#include <stdlib.h>
+#include <GL/gl.h>
+#include <math.h>
#include "circle.h"
Circle *
@@ -32,3 +34,18 @@ engine_circle_new(float cx, float cy, float r, int num_segments, int outline)
return circle;
}
+
+void
+engine_render_circle(Circle *circle)
+{
+ glBegin(GL_LINE_LOOP);
+
+ for (int i = 0; i < circle->num_segments; i++) {
+ float theta = 2.0f * M_PI * i / circle->num_segments;
+ float x = circle->r * cosf(theta);
+ float y = circle->r * sinf(theta);
+ glVertex2f(circle->cx + x, circle->cy + y);
+ }
+
+ glEnd();
+}