Initial commit

Box3f.c

@@ -0,0 +1,56 @@
+#include "CgeMath.h"
+#include <string.h>
+
+#define EPSILON 0.00001f
+#define PI      3.14159265358979323846f
+
+void CgeBox3fUnion(const float aMin[3], const float aMax[3],
+                   const float bMin[3], const float bMax[3],
+                   float outMin[3], float outMax[3]) {
+    CgeVec3fMin(aMin, bMin, outMin);
+    CgeVec3fMax(aMax, bMax, outMax);
+}
+
+int CgeBox3fIntersect(const float aMin[3], const float aMax[3],
+                      const float bMin[3], const float bMax[3],
+                      float outMin[3], float outMax[3]) {
+    CgeVec3fMax(aMin, bMin, outMin);
+    CgeVec3fMin(aMax, bMax, outMax);
+
+    if (outMin[0] >= outMax[0] || outMin[1] >= outMax[1] || outMin[2] >= outMax[2])
+        return 0;
+
+    return 1;
+}
+
+int CgeBox3fContains(const float aMin[3], const float aMax[3],
+                     const float point[3]) {
+    if (point[0] < aMin[0] || point[1] < aMin[1] || point[2] < aMin[2])
+        return 0;
+
+    if (point[0] > aMax[0] || point[1] > aMax[1] || point[2] > aMax[2])
+        return 0;
+
+    return 1;
+}
+
+int CgeBox3fEnclose(const float *points, size_t size, float outMin[3],
+                    float outMax[3]) {
+    float tmp1[3], tmp2[3];
+    size_t i;
+
+    if (!size)
+        return 0;
+
+    memcpy(tmp1, points, sizeof(tmp1));
+    memcpy(tmp2, points, sizeof(tmp2));
+
+    for (i = 1; i < size; i++) {
+        CgeVec3fMin(tmp1, points + i * 3, tmp1);
+        CgeVec3fMax(tmp2, points + i * 3, tmp2);
+    }
+
+    memcpy(outMin, tmp1, sizeof(tmp1));
+    memcpy(outMax, tmp2, sizeof(tmp2));
+    return 1;
+}