From bc1b0276a3947e10f914e83f9750add4fa8b6c00 Mon Sep 17 00:00:00 2001
From: hwc487
Date: Fri, 25 May 2012 09:25:37 -0700
Subject: New functions on shape primitives.

---
 js/lib/geom/shape-primitive.js | 27 +++++++++++++++++++++++++++
 1 file changed, 27 insertions(+)

(limited to 'js/lib/geom')

diff --git a/js/lib/geom/shape-primitive.js b/js/lib/geom/shape-primitive.js
index 380cf334..5a44deb3 100644
--- a/js/lib/geom/shape-primitive.js
+++ b/js/lib/geom/shape-primitive.js
@@ -71,6 +71,33 @@ ShapePrimitive.getMeshBounds = function( verts,  nVerts )
 	return bounds;
 };
 
+ShapePrimitive.getBounds = function( prim )
+{
+	var verts = prim.bufferStreams[0];
+	var nVerts = verts.length;
+	var xMin = verts[0],  xMax = verts[0],
+		yMin = verts[1],  yMax = verts[1],
+		zMin = verts[2],  zMax = verts[2];
+
+	for (var index=3;  index<verts.length;  )
+	{
+		if (verts[index] < xMin)  xMin = verts[index];
+		else if (verts[index] > xMax)  xMax = verts[index];
+
+		index++;
+		if (verts[index] < yMin)  yMin = verts[index];
+		else if (verts[index] > yMax)  yMax = verts[index];
+
+		index++;
+		if (verts[index] < zMin)  zMin = verts[index];
+		else if (verts[index] > zMax)  zMax = verts[index];
+
+		index++;
+	}
+
+	return [xMin, yMin, zMin,  xMax, yMax, zMax];
+};
+
 ShapePrimitive.refineMesh = function( verts, norms, uvs, indices, nVertices,  paramRange,  tolerance )
 {
 	var oldVrtCount = nVertices;
-- 
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