# Exercise 7 : House Display

You will use the previous exercise, but now you will create a more detailed content branch. The objects that will be drawn are now a little house, with 3 (or more)  trees.  There will be of course only one Tree class, but different instances, with different parameters.

## Extend BranchGroup class => House

The base will be made with an IndexedQuadArray object. Width : 6m, Depth : 7m, Height (without roof) : 3m
The roof will be made with an IndexedTriangleArray. Roof height 2 m.

There should be of course a pointy roof, at least one door and 2 windows...

The color of the roof will be different from the color of the walls

## Tips : Creating the House Geometry

The base is made from 8 unique vertices (one for each corner of the rectangular prism).
and we make 5 quad-polygons from these 8 vertices (4 walls + floor) therefore there are 20 indices (5 quads * 4 vertices per quad = 20 indices). We are not using lighting or textures yet so the vertex format is IndexedQuadArray.COORDINATES only.

baseGeometry.setCoordinate( ??? );
baseGeometry.setCoordinateIndex( ??? );

Next you'll need to create a shape from the geometry and color that shape

Appearance app = new Appearance();

ColoringAttributes ca = new ColoringAttributes();
ca.setColor(new Color3f(
??? ));
app.setColoringAttributes(ca);

Shape3D baseShape = new Shape3D(baseGeometry, app);

And a similar method is used to create the roof

IndexedTriangleArray roofGeometry = new IndexedTriangleArray(6, IndexedTriangleArray.COORDINATES, 18);

The roof is made from 6 unique vertices (one for each corner of the triangular prism).
and we make 6 tri-polygons from these 6 vertices (2 triangles * 2 roof sides + front + back) therefore there are 18 indices (6 tris * 3 vertices per tri = 18 indices).

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