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There are two parts in this programming assignment

  • Part 1 is due on Sept 18 11:59pm (2014), NO LATE SUBMISSION!!
  • Part 2 is due on Sept 23 11:59pm (2014).
  • Code: cs451-PA2.7z Δ
  • How to submit
    • email me (jmlien@cs.gmu.edu) and your TA (ple13@masonlive.gmu.edu) a link to all source code in a file named
      • cs451_pa2_part1_[your last name].zip for part 1
      • cs451_pa2_part2_[your last name].zip for part 2
    • Please do not send me the file directly
  • Solution

Part 1 Bounding lattice (50%)

  • Task 1 (10%): render an axis-aligned box B that is 1.2 times larger than the smallest axis-aligned bounding box of the input model
  • Task 2 (10%): render an nx by ny by nz lattice by splitting the axis-aligned box B
    • nx and ny and nz are user inputs
    • You should draw the nodes and the edges of the lattice in different colors, such as red and blue, respectively
  • Task 3 (15%): implement a function that allows user to select a node of the lattice
  • Task 4 (15%): implement a function that allows user to move the selected node using mouse
  • hints
    • Use these functions to compute projections
      • glGetIntegerv( GL_VIEWPORT, ... );
      • glGetDoublev( GL_MODELVIEW_MATRIX, ... );
      • glGetDoublev( GL_PROJECTION_MATRIX, ... );
      • gluProject()
    • Use gluUnProject() when you try to move the selected node around.

Part 2 Free-from deformation (50%)

  • Task 1 (25%): represent each vertex as a weighted combination of lattice nodes
  • Task 2 (25%): update the coordinates of the vertices after a selected node is moved
  • hints

Examples

The following command creates a 3x4x4 lattice around the model 400.obj

> ffd.exe -nx 3 -ny 4 -nz 4 ../models/400.obj

User uses mouse to select a node of the lattice

User uses mouse to move the selected node to a new location (model is not deformed in the image below)

Deformed model using FFD

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