Starting to work with VBOs

conv3d/model.py

@@ -92,6 +92,7 @@ class ModelParser:
         self.faces = []
         self.bounding_box = BoundingBox()
         self.center_and_scale = True
+        self.vbo = None
 
     def add_vertex(self, vertex):
         self.vertices.append(vertex)
@@ -128,6 +129,16 @@ class ModelParser:
             gl.glScalef(1/scale, 1/scale, 1/scale)
             gl.glTranslatef(-center.x, -center.y, -center.z)
 
+        if self.vbo is not None:
+
+            self.vbo.bind()
+            gl.glEnableClientState(gl.GL_VERTEX_ARRAY);
+            gl.glVertexPointerf(self.vbo)
+            gl.glDrawArrays(gl.GL_TRIANGLES, 0, len(self.vbo.data) * 9)
+            self.vbo.unbind()
+
+        else:
+
             gl.glBegin(gl.GL_TRIANGLES)
             for face in self.faces:
                 v1 = self.vertices[face.a.vertex]
@@ -156,6 +167,21 @@ class ModelParser:
         if self.center_and_scale:
             gl.glPopMatrix()
 
+    def generate_vbo(self):
+        from OpenGL.arrays import vbo
+        from numpy import array
+        # Build VBO
+        l = []
+
+        for face in self.faces:
+            v1 = self.vertices[face.a.vertex]
+            v2 = self.vertices[face.b.vertex]
+            v3 = self.vertices[face.c.vertex]
+            l += [[v1.x, v1.y, v1.z], [v2.x, v2.y, v2.z], [v3.x, v3.y, v3.z]]
+
+        self.vbo = vbo.VBO(array(l, 'f'))
+
+
     def generate_vertex_normals(self):
         self.normals = [Normal() for i in self.vertices]
 

modelviewer.py

@@ -42,8 +42,9 @@ class TrackBallControls:
 
         dV = Vertex(move[1] * time * coeff, move[0] * time * coeff, 0)
         dTheta = dV.norm2()
+        print(dTheta)
 
-        if abs(dTheta) < 0.01:
+        if abs(dTheta) < 0.00001:
             return
 
         dV.normalize()
@@ -95,6 +96,7 @@ def main(args):
     running = True
 
     model = load_model(args.input)
+    # model.generate_vbo()
 
     while running:
         for event in pygame.event.get():
@@ -109,6 +111,10 @@ def main(args):
                 if event.button == 1:
                     pygame.mouse.get_rel()
 
+        # Update physics
+        controls.update()
+
+        # Draw frame
         init_frame()
 
         glPushMatrix()
@@ -119,9 +125,7 @@ def main(args):
         glFlush()
         pygame.display.flip()
 
-        # Update physics
-        controls.update()
-
+        # Sleep
         pygame.time.wait(10)