|
| Ubuntu Tutorials Windows Tutorials Download |
Input Handling |
|
|
Written by: Andy Odle
This tutorial builds upon the Add a 2D Sprite tutorial. Please complete the 1.) Download Padle.zip from here. 2.) Extract Padle.png into the "./Debug/images/" folder. 3.) Include DeviceInput.h in main.cpp (See Code Example 1).
Example Code 1:
// Add the keyboard and mouse virtual key codes.
#include "./source/PlatformSpecific/inc/DeviceInput.h"
4.) Change ball_m's starting visibitly to false. 5.) Create a new Sprite called playerOne_m.
6.) Set playerOne_m's postion, width and height to: 7.) Assign the Padle.png texture to playerOne_m. 8.) Set playerOne_m's visibilty to true. 9.) Create a new Sprite called playerTwo_m.
10.) Set playerTwo_m's postion, width and height to: 11.) Assign the Padle.png texture to playerTwo_m. 12.) Set playerTwo_m's visibilty to true. Add the following code to the inside of GOC::Update() function.
A.) Set playerTwo_m's y-cordinate to the mouse's y-cordinate
Example Code 2:
/*
Update your game scenes, check for collisions,
check for input and play sounds here.
*/
// Move player two up and down with the mouse.
playerTwo_m->SetYCor(input_p->YCordinate());
B.) Decrement playerOne_m's y-cordinate by 20, when up is pressed on the
C.) Increment playerOne_m's y-cordinate by 20, when down is pressed on the
Example Code 3:
// Move player one up 20 units when up is pressed.
if(input_p->IsKeyOrButtonPressed(KeysAndButtons::UP_KEYBOARD))
{
playerOne_m->SetYCor(playerOne_m->GetYcor() - 20);
}
// Move player one down 20 units when down is pressed.
if(input_p->IsKeyOrButtonPressed(KeysAndButtons::DOWN_KEYBOARD))
{
playerOne_m->SetYCor(playerOne_m->GetYcor() + 20);
}
Add the following code to the inside of GOC::Destroy() function. A.) Delete playerOne_m's instance. B.) Delete playerTwo_m's instance.
13.) Click Build > Build and Run Project if there were no errors you should see
Figure 1: Input Handling.
Input Handling Complete Example:You can get the complete example source code here.
/*
Date Created: May 06, 2010
FileName: main.cpp
First Sprite Example
*/
#include "./source/PlatformSpecific/inc/GOC.h"
#include "./source/PlatformSpecific/inc/DeviceInput.h"
void GOC::Initialize()
{
/*
Initialize your game scene, and game
variables here.
*/
// Ball's starting postion.
PointGOC ballPosition_l = {GetWindowWidth() / 2,
GetWindowHeight() / 2,
0.0f};
// Initialize the ball.
ball_m = new Sprite();
ball_m->Set2DPosition(ballPosition_l,
24,
24);
ball_m->GetTexture()->LoadTexture("./images/Ball.png");
ball_m->SetVisible(false);
//------------------------
// Player one's starting postion.
PointGOC playerOnePosition_l = {15,
15,
0};
// Initialize player one.
playerOne_m = new Sprite();
playerOne_m->Set2DPosition(playerOnePosition_l,
15,
200);
playerOne_m->GetTexture()->LoadTexture("./images/Padle.png");
playerOne_m->SetVisible(true);
//----------------------------
// Player one's starting postion.
PointGOC playerTwoPosition_l = {GetWindowWidth() - 30,
15,
0};
// Initialize player two.
playerTwo_m = new Sprite();
playerTwo_m->Set2DPosition(playerTwoPosition_l,
15,
200);
playerTwo_m->GetTexture()->LoadTexture("./images/Padle.png");
playerTwo_m->SetVisible(true);
//----------------------------
}
void GOC::Update(TimeGOC *timeGOC_p, InputEngine *input_p)
{
/*
Update your game scenes, check for collisions,
check for input and play sounds here.
*/
// Move player two up and down with the mouse.
playerTwo_m->SetYCor(input_p->YCordinate());
// Move player one up 5 units when up is pressed.
if(input_p->IsKeyOrButtonPressed( KeysAndButtons::UP_KEYBOARD))
{
playerOne_m->SetYCor(playerOne_m->GetYcor() - 20);
}
// Move player one down 5 units when down is pressed.
if(input_p->IsKeyOrButtonPressed( KeysAndButtons::DOWN_KEYBOARD))
{
playerOne_m->SetYCor(playerOne_m->GetYcor() + 20);
}
}
void GOC::IndepedentUpdate(TimeGOC* timeGOC_p, InputEngine* input_p)
{
/*
Update your game scenes, check for collisions,
check for input and play sounds here.
*/
}
void GOC::Destroy()
{
/*
Clean up after your game here.
*/
// Destory your sprite when you are done with it.
delete ball_m;
// Destroy player One and player two.
delete playerOne_m;
delete playerTwo_m;
}
#ifdef _WIN32
// Define the windows main funciton.
int WINAPI WinMain(HINSTANCE hInstance,
HINSTANCE hPrevInstance,
LPSTR lpCmdLine,
int nCmdShow)
#else
// Define the ubutnu main function.
int main(int argc, char **argv)
#endif
{
#ifdef _WIN32
// Start the GOC on windows.
GOC::goc_i()->LoadGOC(hInstance);
#else
// Start the GOC on ubuntu.
GOC::goc_i()->LoadGOC();
#endif
// Destroy and cleanup GOC.
GOC::goc_i()->UnloadGOC();
return 0;
}
Legal Info About GOC Contact Us |
|
