[Solved] Computer Graphics- Lab Assignment 4

Computer Graphics, Lab Assignment 4

+ LabAssignment2/

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• py

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• py

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• py

• The submission time is determined not when the commit is made but when the git push is made.

1. Write down a Python program to draw a transformed triangle in a 2D space.
2. Set the window title to your student ID and the window size to (480,480).
3. Complete the render() function below to draw a triangle in the manner described in C.
4. You have to use OpenGL transformation functions. Do not use numpy matrix multiplication for composing transformations.

def render(): glClear(GL_COLOR_BUFFER_BIT) glLoadIdentity() # draw cooridnates glBegin(GL_LINES) glColor3ub(255, 0, 0) glVertex2fv(np.array([0.,0.])) glVertex2fv(np.array([1.,0.])) glColor3ub(0, 255, 0) glVertex2fv(np.array([0.,0.])) glVertex2fv(np.array([0.,1.])) glEnd() glColor3ub(255, 255, 255) ########################### # implement here ########################### drawTriangle() def drawTriangle(): glBegin(GL_TRIANGLES) glVertex2fv(np.array([0.,.5])) glVertex2fv(np.array([0.,0.])) glVertex2fv(np.array([.5,0.])) glEnd()

1. If you press or repeat a key, the triangle should be transformed as shown in the Table:

Key	Transformation
Q	Translate by -0.1 in x direction
E	Translate by 0.1 in x direction
A	Rotate by 10 degrees counterclockwise
D	Rotate by 10 degrees clockwise
1	Reset the triangle with identity matrix

1. Transformations should be accumulated (composed with previous one) unless you press ‘1’.
2. You may need a global variable (like a python list object) to store key inputs.
3. Files to submit: A Python source file (Name the file whatever you want (in English). Extension should be .py) F.Expected result:

2. Write down a Python program to draw rotating point p=(0.5, 0) and vector v=(0.5, 0) in a 2D space.
3. Set the window title to your student ID and the window size to (480,480).
4. Use the following render() and fill “# your implementation” parts to render p and v.
5. Hint: Render the vector v as a line segment starting from the origin (0,0).

def render(M): glClear(GL_COLOR_BUFFER_BIT) glLoadIdentity() # draw cooridnate glBegin(GL_LINES) glColor3ub(255, 0, 0) glVertex2fv(np.array([0.,0.])) glVertex2fv(np.array([1.,0.])) glColor3ub(0, 255, 0) glVertex2fv(np.array([0.,0.])) glVertex2fv(np.array([0.,1.])) glEnd() glColor3ub(255, 255, 255) # draw point p glBegin(GL_POINTS) # your implementation glEnd() # draw vector v glBegin(GL_LINES) # your implementation glEnd()

1. Expected result: Uploaded LabAssignment5-1.mp4
2. Do not mind the initial angle.
3. p and v should be t rad rotated when t seconds have elapsed since the program was executed.
4. You need to somehow combine a rotation matrix and a translation matrix to produce the expected result.
5. Files to submit: A Python source file (Name the file whatever you want (in English). Extension should be .py)