Initial commit

Line.c

@@ -0,0 +1,30 @@
+#include "CgeMath.h"
+#include <string.h>
+
+#define EPSILON 0.00001f
+#define PI      3.14159265358979323846f
+
+int CgeLineFromPoints(const float a[2], const float b[2], float out[3]) {
+    float tmp[2];
+
+    tmp[0] = a[1] - b[1];
+    tmp[1] = b[0] - a[0];
+    if (CgeVec2fNormalEx(tmp, tmp) < EPSILON)
+        return 0;
+
+    out[2] = CgeVec2fDot(tmp, a);
+    memcpy(out, tmp, sizeof(tmp));
+    return 1;
+}
+
+float CgeLineDistance(const float line[3], const float point[2]) {
+    return CgeVec2fDot(line, point) - line[2];
+}
+
+void CgeLineClosestPoint(const float line[3], const float point[2],
+                         float out[2]) {
+    float tmp[2];
+
+    CgeVec2fScale(line, CgeLineDistance(line, point), tmp);
+    CgeVec2fSub(point, tmp, out);
+}