refactor

1 files changed, 31 insertions, 0 deletions

diff --git a/rand.cpp b/rand.cpp
new file mode 100644
index 0000000..7a327ee
--- /dev/null
+++ b/rand.cpp
@@ -0,0 +1,31 @@
+#include "balls.h"
+
+double
+randDouble(double lo, double hi) {
+	double r, diff;
+	static int isInitialized = 0;
+
+	if (!isInitialized) { /* first call */
+		srand(time(0));
+		isInitialized = 1;
+	}
+
+	r = (double) rand() / (double) RAND_MAX;
+	diff = hi - lo;
+	return lo + r*diff;
+}
+
+Color
+randColor(void) {
+	Color color;
+
+	color.r = randDouble(0, 1);
+	color.g = randDouble(0, 1);
+	color.b = randDouble(0, 1);
+	return color;
+}
+
+Point
+randPtInRect(Rectangle r) {
+	return Pt(randDouble(r.min.x, r.max.x), randDouble(r.min.y, r.max.y));
+}