--- /dev/null
+
+/*] Copyright (c) 2009-2010, Charles McGarvey [**************************
+**] All rights reserved.
+*
+* vi:ts=4 sw=4 tw=75
+*
+* Distributable under the terms and conditions of the 2-clause BSD license;
+* see the file COPYING for a complete text of the license.
+*
+**************************************************************************/
+
+#ifndef _MOOF_AABB_HH_
+#define _MOOF_AABB_HH_
+
+/**
+ * \file aabb.hh
+ * Axis-aligned Bounding Box
+ */
+
+#include <moof/cullable.hh>
+#include <moof/drawable.hh>
+#include <moof/math.hh>
+#include <moof/plane.hh>
+#include <moof/shape.hh>
+
+#include <moof/frustum.hh> // FIXME: this file is quite broken
+#include <moof/opengl.hh>
+#include <moof/texture.hh>
+
+
+namespace moof {
+
+
+class script;
+
+
+template <int D = 3>
+struct aabb : public cullable, public drawable, public shape<D>
+{
+ typedef moof::vector< scalar, fixed<D> > vector;
+
+ vector min;
+ vector max;
+
+
+ aabb() {}
+
+ aabb(const vector& a, const vector& b)
+ {
+ init(a, b);
+ }
+
+ aabb(scalar x1, scalar y1, scalar x2, scalar y2)
+ {
+ vector a(x1, y1);
+ vector b(x2, y2);
+
+ init(a, b);
+ }
+
+ aabb(scalar x1, scalar y1, scalar z1, scalar x2, scalar y2, scalar z2)
+ {
+ vector a(x1, y1, z1);
+ vector b(x2, y2, z2);
+
+ init(a, b);
+ }
+
+
+ void init(const vector2& a, const vector2& b)
+ {
+ if (a[0] < b[0])
+ {
+ min[0] = a[0];
+ max[0] = b[0];
+ }
+ else
+ {
+ min[0] = b[0];
+ max[0] = a[0];
+ }
+ if (a[1] < b[1])
+ {
+ min[1] = a[1];
+ max[1] = b[1];
+ }
+ else
+ {
+ min[1] = b[1];
+ max[1] = a[1];
+ }
+ }
+
+ void init(const vector3& a, const vector3& b)
+ {
+ if (a[0] < b[0])
+ {
+ min[0] = a[0];
+ max[0] = b[0];
+ }
+ else
+ {
+ min[0] = b[0];
+ max[0] = a[0];
+ }
+ if (a[1] < b[1])
+ {
+ min[1] = a[1];
+ max[1] = b[1];
+ }
+ else
+ {
+ min[1] = b[1];
+ max[1] = a[1];
+ }
+ if (a[2] < b[2])
+ {
+ min[2] = a[2];
+ max[2] = b[2];
+ }
+ else
+ {
+ min[2] = b[2];
+ max[2] = a[2];
+ }
+ }
+
+
+ vector center() const
+ {
+ return (min + max) / 2.0;
+ }
+
+
+ plane xy_plane() const
+ {
+ plane plane;
+ plane.normal = vector3(0.0, 0.0, 1.0);
+ plane.d = dot(-plane.normal, center());
+ return plane;
+ }
+
+ plane xz_plane() const
+ {
+ plane plane;
+ plane.normal = vector3(0.0, 1.0, 0.0);
+ plane.d = dot(-plane.normal, center());
+ return plane;
+ }
+
+ plane yz_plane() const
+ {
+ plane plane;
+ plane.normal = vector3(1.0, 0.0, 0.0);
+ plane.d = dot(-plane.normal, center());
+ return plane;
+ }
+
+
+ void get_corners(vector2 corners[4]) const
+ {
+ corners[0][0] = min[0]; corners[0][1] = min[1];
+ corners[1][0] = max[0]; corners[1][1] = min[1];
+ corners[2][0] = max[0]; corners[2][1] = max[1];
+ corners[3][0] = min[0]; corners[3][1] = max[1];
+ }
+
+ void get_corners(vector3 corners[8]) const
+ {
+ corners[0][0] = min[0];
+ corners[0][1] = min[1];
+ corners[0][2] = max[2];
+ corners[1][0] = max[0];
+ corners[1][1] = min[1];
+ corners[1][2] = max[2];
+ corners[2][0] = max[0];
+ corners[2][1] = max[1];
+ corners[2][2] = max[2];
+ corners[3][0] = min[0];
+ corners[3][1] = max[1];
+ corners[3][2] = max[2];
+ corners[4][0] = min[0];
+ corners[4][1] = min[1];
+ corners[4][2] = min[2];
+ corners[5][0] = max[0];
+ corners[5][1] = min[1];
+ corners[5][2] = min[2];
+ corners[6][0] = max[0];
+ corners[6][1] = max[1];
+ corners[6][2] = min[2];
+ corners[7][0] = min[0];
+ corners[7][1] = max[1];
+ corners[7][2] = min[2];
+ }
+
+
+ void enclose_vertices(const vector vertices[], unsigned count)
+ {
+ min.zero();
+ max.zero();
+
+ for (unsigned i = 1; i < count; ++i)
+ {
+ min.minimize(vertices[i]);
+ max.maximize(vertices[i]);
+ }
+ }
+
+
+ void draw(scalar alpha = 0.0) const
+ {
+ glRect(min[0], min[1], max[0], max[1]);
+ }
+
+ bool is_visible(const frustum& frustum) const
+ {
+ return true;
+ }
+};
+
+
+void import_aabb_class(script& script);
+
+template <>
+inline void aabb<3>::draw(scalar alpha) const
+{
+ scalar vertices[] = {min[0], min[1], min[2],
+ min[0], max[1], min[2],
+ max[0], max[1], min[2],
+ max[0], min[1], min[2],
+ min[0], max[1], max[2],
+ min[0], min[1], max[2],
+ max[0], min[1], max[2],
+ max[0], max[1], max[2]};
+
+ GLubyte indices[] = {0, 1, 2, 3,
+ 1, 2, 7, 4,
+ 3, 0, 5, 6,
+ 2, 3, 6, 7,
+ 5, 0, 1, 4,
+ 4, 5, 6, 7};
+
+ glEnableClientState(GL_VERTEX_ARRAY);
+ glDisableClientState(GL_TEXTURE_COORD_ARRAY);
+ glVertexPointer(3, GL_SCALAR, 0, vertices);
+
+ glPolygonMode(GL_FRONT_AND_BACK, GL_LINE);
+ texture::reset_binding();
+
+ glDrawElements(GL_QUADS, sizeof(indices), GL_UNSIGNED_BYTE,
+ indices);
+
+ glEnableClientState(GL_TEXTURE_COORD_ARRAY);
+ //glDisableClientState(GL_VERTEX_ARRAY);
+
+ glPolygonMode(GL_FRONT_AND_BACK, GL_FILL);
+}
+
+template <>
+inline bool aabb<3>::is_visible(const frustum& frustum) const
+{
+ return frustum.contains(*this);
+}
+
+
+typedef aabb<2> aabb2;
+typedef aabb2 rectangle;
+typedef aabb<3> aabb3;
+
+
+} // namespace moof
+
+#endif // _MOOF_AABB_HH_
+
projects / chaz / yoink / blobdiff