Wireframe Simulator Sarah Cheng 6.111 Spring 2007.

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Presentation transcript:

Wireframe Simulator Sarah Cheng Spring 2007

Project Functionality 1.Read user-specified 3D coordinates from ROM 2.Transform (rotate, pan, zoom) coordinates if respective buttons are pressed 3.Generate wireframe model on-the-fly Source:

Transformations Perform grungy math on each of the vertices: Rotating left/right (x’, y’, z’) = (x cos θ + y sin θ, x sin θ + y cos θ, z) Rotating up/down (x’, y’, z’) = (x cos φ + z sin φ, y, x sin φ + z cos φ) Panning left/right (x’, y’, z’) = (x + a, y, z) Panning up/down (x’, y’, z’) = (x, y, z + a) Zooming in/out (x’, y’, z’) = (x, y + a, z)

Perspective Projection xv, yv, zv viewerscreenobject z = a (x1, y1, z1), (x2, y2, z2), … Projected coordinates (xp1, yp1) onto screen z = a: (zv - a) / (zv - z1) = (xv - xp1) / (xv - x1) = (yv - yp1) / (yv - y1) Solve for xp1, yp1!

Implementation

Display Module