initial working frustum culling implementation

[chaz/yoink] / src / Moof / Aabb.cc

diff --git a/src/Moof/Aabb.cc b/src/Moof/Aabb.cc
index d81c971f78947d61a0df5d5b0de4344c46f93b16..c844251b1d0551b2fcf9c94a8ddf2929c11baf6e 100644 (file)
--- a/src/Moof/Aabb.cc
+++ b/src/Moof/Aabb.cc
@@ -28,11 +28,83 @@
 
 #include <Moof/Aabb.hh>
 #include <Moof/Camera.hh>
+#include <Moof/OpenGL.hh>
+#include <Moof/Texture.hh>
 
 
 namespace Mf {
 
 
+void Aabb::getOctant(Aabb& octant, int num) const
+{
+       Vector3 mid = getCenter();
+
+       switch (num)
+       {
+               case 0:
+                       octant.init(Vector3(min[0], min[1], mid[2]),
+                                               Vector3(mid[0], mid[1], max[2]));
+                       break;
+               case 1:
+                       octant.init(Vector3(mid[0], min[1], mid[2]),
+                                               Vector3(max[0], mid[1], max[2]));
+                       break;
+               case 2:
+                       octant.init(mid, max);
+                       break;
+               case 3:
+                       octant.init(Vector3(min[0], mid[1], mid[2]),
+                                               Vector3(mid[0], max[1], max[2]));
+                       break;
+               case 4:
+                       octant.init(min, mid);
+                       break;
+               case 5:
+                       octant.init(Vector3(mid[0], min[1], min[2]),
+                                               Vector3(max[0], mid[1], mid[2]));
+                       break;
+               case 6:
+                       octant.init(Vector3(mid[0], mid[1], min[2]),
+                                               Vector3(max[0], max[1], mid[2]));
+                       break;
+               case 7:
+                       octant.init(Vector3(min[0], mid[1], min[2]),
+                                               Vector3(mid[0], max[1], mid[2]));
+                       break;
+       }
+}
+
+
+void Aabb::getCorners(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 Aabb::encloseVertices(const Vector3 vertices[], unsigned count)
+{
+       min = vertices[0];
+       max = vertices[0];
+
+       for (unsigned i = 1; i < count; ++i)
+       {
+               if (vertices[i][0] < min[0]) min[0] = vertices[i][0];
+               if (vertices[i][0] > max[0]) max[0] = vertices[i][0];
+               if (vertices[i][1] < min[1]) min[1] = vertices[i][1];
+               if (vertices[i][1] > max[1]) max[1] = vertices[i][1];
+               if (vertices[i][2] < min[2]) min[2] = vertices[i][2];
+               if (vertices[i][2] > max[2]) max[2] = vertices[i][2];
+       }
+}
+
+
 void Aabb::draw(Scalar alpha) const
 {
        Scalar vertices[] = {min[0], min[1], min[2],
@@ -52,14 +124,23 @@ void Aabb::draw(Scalar alpha) const
                                                 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::resetBind();
+
        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);
 }
 
 bool Aabb::isVisible(const Camera& cam) const
 {
-       return cam.getFrustum().checkAabb(*this);
+       return cam.getFrustum().containsAabb(*this);
 }