Project 3

1
Project 3

• Landscape
• Mon, Oct 6, 2003
• Due Wed, Oct 15, 2003

2
Landscape

• Read the handout.
• Download the files.
• Landscape.cpp.
• point3.h.
• Run Landscape.exe.

3
Landscape

• Your job is to write the functions that draw the
  trees and the fence.
• drawTrees()
• drawOneTree()
• drawFence()
• drawFenceSegment()

4
The drawTrees() Function

• The drawTrees() function should set the modelview
  matrix for each individual tree and then call on
  drawOneTree() to draw the tree.

5
The drawOneTree() Function

• The drawOneTree() function will draw a tree at
  the current location, as determined by the
  modelview matrix.
• A tree consists of a trunk and a crown of leaves.
• That is, a cylinder and a sphere, each properly
  positioned and colored.
• You may add fall colors if you wish.

6
The drawOneTree() Function

• The functions drawSphere() and drawCylinder() are
  provided.
• You must first set the modelview matrix before
  drawing the trunk or the leaves.
• Otherwise, you will get this
• BadTree.exe

7
The drawFenceSegment() Function

• It will be much easier to draw a fence if you
  first draw a segment of a fence.
• It consists of a post, two rails, and several
  pickets.

8
The drawFenceSegment() Function

• Use the functions drawPost(), drawRail(), and
  drawPicket(), which are provided.
• Use a for loop to draw the pickets.
• This unit segment will be used by drawFence() to
  draw the entire fence.

9
The drawFenceSegment() Function

• You must align the pieces carefully.
• The front face of the rail must be at the
  vertical centerline of the post.

10
The drawFenceSegment() Function

• The back face of the pickets must be flush with
  the front face of the rails.
• The posts and pickets must be separated by gaps.

11
The drawFence() Function

• To draw the fence, you should first set the
  modelview matrix so that the current position is
  the front left corner post of the fence.
• Then call on drawFenceSegment() repeatedly to
  draw the segments around the house.

12
The drawFence() Function

• Draw the proper number of fence segments in front
  of the house.
• Then turn 90? and draw the proper number of
  segments along the right side.
• Then do the back and the left side.

13
Global Constants

• The program contains a large number of global
  constants that govern the sizes of various
  objects.
• Be sure to use them.
• In fact, they should make your work easier.

14
Suggestions

• Experiment with drawing one object at a time at
  the center of the scene.
• FenceSegmentTest.exe

drawGround() // drawHouse() // drawTrees() //
drawBushes() // drawFence() // drawSun() glCol
or3f(1.0, 1.0, 1.0) drawFenceSegment()
15
Suggestions

• Use a sheet of graph paper to sketch the fence
  segment to determine the proper transformations.

16
Suggestions

• Reset the look point to special positions to
  verify that objects have been placed correctly.
• For example, the top of the left front corner
  post should be at
• (-28, 3.3333, 25).
• Landscape.exe