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/*
* Bounce
*
* A simple Boing like demo
*
* Matt Kohls
* 2019
*
*
*/
// Amiga includes
#include <proto/intuition.h>
#include <proto/gadtools.h>
#include <proto/graphics.h>
#include <proto/layers.h>
#include <proto/exec.h>
#include <proto/dos.h>
#include <intuition/intuition.h>
#include <stdint.h>
#include <stdlib.h>
// Constants
const uint16_t SCREEN_WIDTH = 100;
const uint16_t SCREEN_HEIGHT = 100;
const uint16_t POSX = 10;
const uint16_t POSY = 10;
/**
* WindowPos
* Keeps track of window position
*/
struct WindowPos {
uint16_t posx;
uint16_t posy;
};
/**
* WindowSize
* Keeps track of window size
*/
struct WindowSize {
uint16_t width;
uint16_t height;
};
/**
* BallPos
* Keeps track of ball position
*/
struct BallPos {
uint16_t posx;
uint16_t posy;
};
/**
* AmigaWindow
* Wrapper class for Amgia functions
*
*/
class AmigaWindow {
private:
struct BallPos ballpos;
int bounceDirX;
int bounceDirY;
struct WindowPos winposition;
struct WindowSize winsize;
struct Window *window;
struct RastPort *rp;
struct IntuiMessage *msg;
ULONG msgClass;
bool bad;
/**
* Initialize the window
*/
void init() {
bad = false;
window = OpenWindowTags(NULL,
WA_Left, winposition.posx, WA_Top, winposition.posy,
WA_Width, winsize.width, WA_Height, winsize.height,
WA_IDCMP, IDCMP_CLOSEWINDOW | IDCMP_REFRESHWINDOW,
WA_Flags, WFLG_SIZEGADGET | WFLG_DRAGBAR | WFLG_DEPTHGADGET |
WFLG_CLOSEGADGET | WFLG_ACTIVATE | WFLG_SMART_REFRESH,
WA_Title, "Bounce", WA_PubScreenName, "Workbench", TAG_DONE);
if(window == nullptr) {
bad = true;
} else {
rp = window->RPort;
if(rp == nullptr) {
bad = true;
}
}
}
/**
* Draws the bouncing ball on screen
*/
void drawBounce() {
BallPos oldPos = ballpos;
if(ballpos.posx == 10) {
bounceDirX = 1;
} else if(ballpos.posx == winsize.width - 10) {
bounceDirX = -1;
}
if(ballpos.posy == 10) {
bounceDirY = 1;
} else if(ballpos.posy == winsize.height - 10) {
bounceDirY = -1;
}
ballpos.posx += bounceDirX;
ballpos.posy += bounceDirY;
SetAPen(rp, (ULONG) 0);
DrawEllipse(rp, oldPos.posx + 1, oldPos.posy + 1, 5, 5);
DrawEllipse(rp, oldPos.posx, oldPos.posy, 5, 5);
SetAPen(rp, (ULONG) 1);
DrawEllipse(rp, ballpos.posx + 1, ballpos.posy + 1, 5, 5);
SetAPen(rp, (ULONG) 2);
DrawEllipse(rp, ballpos.posx, ballpos.posy, 5, 5);
}
public:
/**
* Creates an empty window of a default size and position
*/
AmigaWindow() {
winposition = {POSX, POSY};
winsize = {SCREEN_WIDTH, SCREEN_HEIGHT};
init();
}
/**
* Creates a new window of specific size and position
* @param pos Position of window
* @param size Size of window
*/
AmigaWindow(const WindowPos& pos, const WindowSize& size) {
winposition = pos;
winsize = size;
init();
}
/**
* Cleans up window
*/
~AmigaWindow() {
if(window != nullptr) {
CloseWindow(window);
window = nullptr;
}
}
/**
* Window loop for program
*/
void runLoop() {
ballpos = {15, 20}; // Temp for now
bounceDirX = 1; // Temp for now
bounceDirY = -1; // Temp for now
drawBounce();
bool stop = false;
while(!bad && !stop) {
// If there is a message in the queue, handle it
if(msg = GT_GetIMsg(window->UserPort)) {
msgClass = msg->Class;
GT_ReplyIMsg(msg);
if(msgClass == IDCMP_CLOSEWINDOW) {
CloseWindow(window);
stop = true;
window = nullptr;
} else if(msgClass == IDCMP_REFRESHWINDOW) {
RefreshWindowFrame(window);
}
}
drawBounce();
Delay(10);
}
}
/**
* Tells us if there is an error with the window
* @return True if there is an error, False if not
*/
bool isBad() const { return bad; }
};
int main(int argc, char** argv) {
AmigaWindow amigaWindow;
if(amigaWindow.isBad()) { return -1; }
amigaWindow.runLoop();
if(amigaWindow.isBad()) { return -1; }
return 0;
}
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