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Draw Triangles

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I managed to make an .ase loader that memorates vertices positions and indexes, then i need to render them all in triangles. But actually i get redundant triangles: obj_c = object number mesh[obj_c].vertex_buffer = the vertex buffer of an object mesh[obj_c].vertices = the number of vertices a object has mesh[obj_c].faces = how many faces the object has
void DrawScene() {
for(int obj_c = 0; obj_c < scene_objects; obj_c++){

Device->SetStreamSource(0, mesh[obj_c].vertex_buffer, 0, sizeof(Vertex));
Device->DrawIndexedPrimitive(D3DPT_TRIANGLELIST, 0, 0, mesh[obj_c].vertices, 0, mesh[obj_c].faces);

In the .ase a cube is counted as: FACES:12 VERTICES:8 Thanks..

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