From 79eca25c945a535a7a0325999034bae17da92412 Mon Sep 17 00:00:00 2001
From: dan miller
Date: Fri, 19 Oct 2007 05:15:33 +0000
Subject: resubmitting ode

---
 libraries/ode-0.9/contrib/dRay/dRay_Plane.cpp | 35 +++++++++++++++++++++++++++
 1 file changed, 35 insertions(+)
 create mode 100644 libraries/ode-0.9/contrib/dRay/dRay_Plane.cpp

(limited to 'libraries/ode-0.9/contrib/dRay/dRay_Plane.cpp')

diff --git a/libraries/ode-0.9/contrib/dRay/dRay_Plane.cpp b/libraries/ode-0.9/contrib/dRay/dRay_Plane.cpp
new file mode 100644
index 0000000..cf03c5b
--- /dev/null
+++ b/libraries/ode-0.9/contrib/dRay/dRay_Plane.cpp
@@ -0,0 +1,35 @@
+// Ripped from Paul Bourke
+
+#include "Include\dRay.h"
+#include "dxRay.h"
+
+int dCollidePR(dxGeom* RayGeom, dxGeom* PlaneGeom, int Flags, dContactGeom* Contact, int Stride){
+	dVector3 Plane;
+	dGeomPlaneGetParams(PlaneGeom, Plane);
+
+	dVector3 Origin, Direction;
+	dGeomRayGet(RayGeom, Origin, Direction);
+
+	dReal Length = dGeomRayGetLength(RayGeom);
+
+	dReal Denom = Plane[0] * Direction[0] + Plane[1] * Direction[1] + Plane[2] * Direction[2];
+	if (dFabs(Denom) < 0.00001f){
+		return 0;	// Ray never hits
+	}
+	
+	float T = -(Plane[3] + Plane[0] * Origin[0] + Plane[1] * Origin[1] + Plane[2] * Origin[2]) / Denom;
+	
+	if (T < 0 || T > Length){
+		return 0;	// Ray hits but not within boundaries
+	}
+
+	Contact->pos[0] = Origin[0] + T * Direction[0];
+	Contact->pos[1] = Origin[1] + T * Direction[1];
+	Contact->pos[2] = Origin[2] + T * Direction[2];
+	Contact->pos[3] = REAL(0.0);
+	//Contact->normal = 0;
+	Contact->depth = 0.0f;
+	Contact->g1 = RayGeom;
+	Contact->g2 = PlaneGeom;
+	return 1;
+}
\ No newline at end of file
-- 
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