experimental shapes hierarchy and raycasting

[chaz/yoink] / src / Moof / Ray.hh

diff --git a/src/Moof/Ray.hh b/src/Moof/Ray.hh
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+
+/*******************************************************************************
+
+ Copyright (c) 2009, Charles McGarvey
+ All rights reserved.
+ 
+ Redistribution   and   use  in  source  and  binary  forms,  with  or  without
+ modification, are permitted provided that the following conditions are met:
+ 
+   * Redistributions  of  source  code  must retain the above copyright notice,
+     this list of conditions and the following disclaimer.
+   * Redistributions  in binary form must reproduce the above copyright notice,
+     this  list of conditions and the following disclaimer in the documentation
+     and/or other materials provided with the distribution.
+ 
+ THIS  SOFTWARE  IS  PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ AND  ANY  EXPRESS  OR  IMPLIED  WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ DISCLAIMED.  IN  NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+ FOR  ANY  DIRECT,  INDIRECT,  INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ DAMAGES  (INCLUDING,  BUT  NOT  LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ SERVICES;  LOSS  OF  USE,  DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ CAUSED  AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ OR  TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+*******************************************************************************/
+
+#ifndef _MOOF_RAY_HH_
+#define _MOOF_RAY_HH_
+
+#include <Moof/Drawable.hh>
+#include <Moof/Math.hh>
+#include <Moof/OpenGL.hh>
+#include <Moof/Texture.hh>
+
+
+namespace Mf {
+
+
+/**
+ * A line that goes to infinity.
+ */
+
+template <int D>
+struct Ray : public Drawable
+{
+       typedef cml::vector< Scalar, cml::fixed<D> >    Vector;
+
+       // solution = point + t*direction
+       Vector  point;
+       Vector  direction;
+
+       struct Intersection
+       {
+               Vector  point;          // nearest point of intersection
+               Vector  normal;         // surface normal at intersection point
+       };
+
+       void solve(Vector& p, Scalar t) const
+       {
+               p = point + t*direction;
+       }
+
+       void draw(Scalar alpha = 0.0) const
+       {
+               Vector end = point + 1000.0 * direction;
+
+               Mf::Texture::resetBind();
+               glBegin(GL_LINES);
+                       glVertex(point);
+                       glVertex(end);
+               glEnd();
+       }
+
+       void normalize()
+       {
+               direction.normalize();
+       }
+
+};
+
+
+} // namespace Mf
+
+#endif // _MOOF_RAY_HH_
+
+/** vim: set ts=4 sw=4 tw=80: *************************************************/
+