Game Development Reference
In-Depth Information
using
Microsoft.Xna.Framework;
1
using
Microsoft.Xna.Framework.Content;
2
using
Microsoft.Xna.Framework.Graphics;
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4
5
class
Ball : ThreeColorGameObject
{
6
bool
shooting;
7
8
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public
Ball(ContentManager Content)
:
base
(Content.Load<Texture2D>("spr_ball_red"),
10
Content.Load<Texture2D>("spr_ball_green"),
11
Content.Load<Texture2D>("spr_ball_blue"))
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{
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}
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15
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public override void
HandleInput(InputHelper inputHelper)
{
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if
(inputHelper.MouseLeftButtonPressed() && !shooting)
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{
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shooting =
true
;
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−
∗
velocity = (inputHelper.MousePosition
position)
1.2f;
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}
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}
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24
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public override void
Update(GameTime gameTime)
{
26
if
(shooting)
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{
28
∗
velocity.X
= 0.99f;
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velocity.Y += 6;
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}
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else
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{
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Color = Painter.GameWorld.Cannon.Color;
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−
position = Painter.GameWorld.Cannon.BallPosition
Center;
35
}
36
if
(Painter.GameWorld.IsOutsideWorld(position))
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Reset();
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base
.Update(gameTime);
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}
40
41
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public override void
Reset()
{
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base
.Reset();
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position =
new
Vector2(65, 390);
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velocity = Vector2.Zero;
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shooting =
false
;
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}
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}
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Listing 10.2
The final
Ball
class
