Description

Upload Assignment: Programming Assignment 2: 3D Modeling & Transformations

need to figure out how to use hierarchy structure to store components and set them in proper position through chaining transformation. Remember to modularize your design to one class (e.g. like Arm.java in example code), you might need to reuse them in next programming assignment.
3. TODO 3 in “Sketch.py”: After building your body and limb classes, you need to create the instances of them in Sketch.py -> __init__() method.
4. TODO 4 in “Sketch.py” or “ModelLinkage.py”: Set up the joint behaviors of your creature after finishing TODO 3. Please refer to TOREAD 1 to see what functions are already available to you. Limit the angles at each joint within reasonable ranges so that creature’s legs, neck, head and any other parts don’t intersect or bend in unnatural ways! The orientation of joint rotations for the left and right limbs should mirror each other. Gimbal lock should be avoided.
5. TODO 5 in “Sketch.py”: Set up the keyboard events which could make your creature act. Please also add a multi-select feature to the interface, so you can control several joints at the same time. Also please set up 5 different poses for your creatures as test cases. After that, please check your keyboard events and test cases to see if they work as expected and satisfy our requirements.
6. TODO 6 in “Sketch.py”: Implement an eye that always looksat the position of the mouse when no rotation of the camera is performed. An eye should consists of movable pupil and still sclera.
Extra Credits
7. BONUS1 in “DisplayCube.py”: Implement the texturemapping that binds texture images to your geometric objects.
8. BONUS2 in “Sketch.py”: Use quaternion to implement eyeballrotation.
Programming Style
9. For any modified or newly added source file, you should include a brief explanation about what you did in this file in the file heading and add your name to the author list. Your code should be readable with sufficient comments. You should use consistent variable naming and keep reasonable indentation. In python, we prefer to use reStructuredText format docstring, for more details about this format, please check here.
Model Requirements
In addition to roughly following the reference image/drawing you will provide, your model should be suitably complex:
• at least 6 limbs required (tails and wings count)
• each limb must have at least 3 joints
• at least two colors should be used
• at least two shape types must be used
• a pair of opposing limbs must be present (to test mirrored motions)
2. Resources
2.1 Start code
A Python Program skeleton PA2.zip, which includes basic classes, methods, and main pipeline, is provided for you. You are expected to complete the sketch program by completing/modifying Sketch.py. There are comments in the skeleton code that will help guide you in writing your own subroutines. Some of them are noted as “TODO” or “BONUS” which suggest you should complete the corresponding block.
2.2 Environment Setup
Installing the appropriate programming environment should be covered in a lab session. For more step-by-step instructions, please check the environment setup page.
2.3 User Interface
The user interface to the program is provided through mouse buttons and keyboard keys:
• ENTER/RETURN: Cycle through components
• LEFT-ARROW, RIGHT-ARROW: Iterate through different rotation axis for the currently selected component
• UP-ARROW, mouse SCROLL-UP: Increase selected component’s rotation angle along the selected axis
• DOWN-ARROW, mouse SCROLL-DOWN: Decrease
selected component’s rotation angle along the selected axis
• mouse Left-Drag: change the viewing angle
• r: reset the viewing angle
• R: reset everything in the scene
2.4 Demo
We prepare a demo video for you. Even though the “creature” in the video doesn’t fully satisfy our requirements, this is still good to show how the multi-select works and what will be like if you set the rotation limit correctly.
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Your program’s source files are to be submitted electronically on Gradescope. Please wrap everything in your project folder to a zip file and submit it. The code you submit should conform to the program assignment guidelines.
3.2 Demo
3.3 Reference image or drawing
Please submit a reference image or drawing of your design. This can be relatively simple, and is simply to motivate some modeling with intent.
4. Grading
Task
3D Creature model constructed satisfies requirements for shapes, hie
Proper rotation at the joints
Limit rotation so that limbs do not bend in unnatural ways
Your predefined 5 creature poses work properly
The creature design is similar to your reference image/drawing
Eye movement
Eye movement with quaternions
Texture mapping
Programming style (See Assignments > General Guidelines)
5. Code Distribution Policy
You acknowledge this code is only for the course learning purpose. You should never distribute any part of this assignment, especially the completed version, to any publicly accessible website or open repository without our permission. Keep the code in your local

computer or private repository is allowed. You should never share, sell, gift or copy the code in any format with any other person without our permission.