From 5ddde30071f639962dd557c453f2ad01f8f0fd00 Mon Sep 17 00:00:00 2001
From: Kristian Monsen <kristianm@google.com>
Date: Wed, 8 Sep 2010 12:18:00 +0100
Subject: Merge WebKit at r66666 : Initial merge by git.

Change-Id: I57dedeb49859adc9c539e760f0e749768c66626f
---
 WebCore/platform/graphics/FloatPoint3D.h | 72 +++++++++++++++++++++++++++++++-
 1 file changed, 71 insertions(+), 1 deletion(-)

(limited to 'WebCore/platform/graphics/FloatPoint3D.h')

diff --git a/WebCore/platform/graphics/FloatPoint3D.h b/WebCore/platform/graphics/FloatPoint3D.h
index d10e3c1..9ee548d 100644
--- a/WebCore/platform/graphics/FloatPoint3D.h
+++ b/WebCore/platform/graphics/FloatPoint3D.h
@@ -65,15 +65,85 @@ public:
 
     float z() const { return m_z; }
     void setZ(float z) { m_z = z; }
+    void set(float x, float y, float z)
+    {
+        m_x = x;
+        m_y = y;
+        m_z = z;
+    }
+    void move(float dx, float dy, float dz)
+    {
+        m_x += dx;
+        m_y += dy;
+        m_z += dz;
+    }
+    void scale(float sx, float sy, float sz)
+    {
+        m_x *= sx;
+        m_y *= sy;
+        m_z *= sz;
+    }
 
     void normalize();
 
+    float dot(const FloatPoint3D& a) const
+    {
+        return m_x * a.x() + m_y * a.y() + m_z * a.z();
+    }
+
+    // Sets this FloatPoint3D to the cross product of the passed two.
+    // It is safe for "this" to be the same as either or both of the
+    // arguments.
+    void cross(const FloatPoint3D& a, const FloatPoint3D& b)
+    {
+        float x = a.y() * b.z() - a.z() * b.y();
+        float y = a.z() * b.x() - a.x() * b.z();
+        float z = a.x() * b.y() - a.y() * b.x();
+        m_x = x;
+        m_y = y;
+        m_z = z;
+    }
+
+    // Convenience function returning "this cross point" as a
+    // stack-allocated result.
+    FloatPoint3D cross(const FloatPoint3D& point) const
+    {
+        FloatPoint3D result;
+        result.cross(*this, point);
+        return result;
+    }
+
+    float length() const;
+    float lengthSquared() const { return this->dot(*this); }
+
 private:
     float m_x;
     float m_y;
     float m_z;
 };
 
+inline FloatPoint3D& operator +=(FloatPoint3D& a, const FloatPoint3D& b)
+{
+    a.move(b.x(), b.y(), b.z());
+    return a;
+}
+
+inline FloatPoint3D& operator -=(FloatPoint3D& a, const FloatPoint3D& b)
+{
+    a.move(-b.x(), -b.y(), -b.z());
+    return a;
+}
+
+inline FloatPoint3D operator+(const FloatPoint3D& a, const FloatPoint3D& b)
+{
+    return FloatPoint3D(a.x() + b.x(), a.y() + b.y(), a.z() + b.z());
+}
+
+inline FloatPoint3D operator-(const FloatPoint3D& a, const FloatPoint3D& b)
+{
+    return FloatPoint3D(a.x() - b.x(), a.y() - b.y(), a.z() - b.z());
+}
+
 inline bool operator==(const FloatPoint3D& a, const FloatPoint3D& b)
 {
     return a.x() == b.x() && a.y() == b.y() && a.z() == b.z();
@@ -87,7 +157,7 @@ inline bool operator!=(const FloatPoint3D& a, const FloatPoint3D& b)
 inline float operator*(const FloatPoint3D& a, const FloatPoint3D& b)
 {
     // dot product
-    return a.x() * b.x() + a.y() * b.y() + a.z() * b.z();
+    return a.dot(b);
 }
 
 } // namespace WebCore
-- 
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