OpenGL viewing notes - Bryn Mawr Computer Science

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Inward and Outward Facing Polygons {v 0 , v 3 , v 2 , v 1 } and {v 1 , v 0 , v 3, v 2 } are equivalent in that the same polygon will be rendered by <strong>OpenGL</strong> but the order {v 0 , v 1 , v 2, v 3 } is different The first two describe outwardly facing polygons <strong>OpenGL</strong> can treat inward and outward facing polygons differently Use the right-hand rule =>
Geometry vs Topology Generally it is a good idea to look for data structures that separate the geometry from the topology Geometry: locations of the vertices Topology: organization of the vertices and edges Topology holds even if geometry changes
Page 1 and 2: CS312 OpenGL Viewing Transformation
Page 3 and 4: OpenGL Buffers Color buffer Front
Page 5 and 6: Moving the Camera The First Approa
Page 7 and 8: Moving the Camera We must be caref
Page 9 and 10: gluLookAt GL uses a more direct me
Page 11 and 12: The OpenGL Camera In OpenGL, initi
Page 13 and 14: Projections in OpenGL The View Vol
Page 15 and 16: Perspectives in OpenGL OpenGL has
Page 17 and 18: Field of View gluPerspective(fovy,
Page 19 and 20: glut 3D Primitives Cube void gl
Page 21 and 22: Defining your own shapes Objects a
Page 23: Simple Representation Define each
Page 27 and 28: Vertex Lists Put the geometry in
Page 29 and 30: Edge List e1 e2 e3 e4 e5 e6 e7 e8 e
Page 31 and 32: Drawing a polygon from a list of in
Page 33 and 34: Efficiency The weakness of our app
Page 35 and 36: Initialization Using the same col
Page 37 and 38: Drawing the cube Method 1: what to
Page 39 and 40: Back Face Culling OpenGL can compu

OpenGL viewing notes - Bryn Mawr Computer Science

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