testing seeking concepts

environmentTest5.cpp

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+#include "Environment.h"
+#include <cstdlib>
+
+// create environment
+Environment environment;
+
+int xpos = environment.getW()/2 - 50;
+int ypos = environment.getH()/2 - 50;
+
+int xvel = 0;
+int yvel = 0;
+
+int xtarget = 0;
+int ytarget = 0;
+
+drawRects() {
+	// render black square
+	environment.setRenderColor(0x00, 0x00, 0x00, 0xFF);
+	environment.drawRectangle(xpos, ypos, 100, 100);
+
+	// render green square
+	environment.setRenderColor(0x00, 200, 0x00, 0xFF);
+	environment.drawRectangle(xtarget - 5, ytarget - 5, 10, 10);
+}
+
+int chooseRandomX() {
+	return rand() % environment.getW();
+}
+
+int chooseRandomY() {
+	return rand() % environment.getH();
+}
+
+changeRectVel() {
+	// if left, go right
+	if (xpos < xtarget) {
+		xvel = 1;
+	}
+
+	// if right, go left
+	if (xpos > xtarget) {
+		xvel = -1;
+	}
+
+	// if up, go down
+	if (ypos < ytarget) {
+		yvel = 1;
+	}
+
+	// if down, go up
+	if (ypos > ytarget) {
+		yvel = -1;
+	}
+
+	// if reached, stop
+	if (xpos == xtarget) {
+		xvel = 0;
+
+	}
+
+	if (ypos == ytarget) {
+		yvel = 0;
+	}
+
+	if (xpos == xtarget && ypos == ytarget) {
+		xtarget = chooseRandomX();
+		ytarget = chooseRandomY();
+	}
+}
+
+changeRectPos() {
+	xpos += xvel;
+	ypos += yvel;
+}
+
+int main(int argc, char* args[]) {	
+	// set title
+	environment.setTitle("Environment Test 5");
+
+	// set width and height of the screen
+	environment.setScreenWidth(700);
+	environment.setScreenHeight(700);
+
+	// initialize
+	environment.init();
+
+	// load media
+	environment.loadMedia();
+
+	// main loop
+	while (environment.isRunning()) {
+		while (environment.pollEvent() != 0) {
+			if (environment.getEvent()->type == SDL_QUIT) {
+				environment.setRunning(false);
+			}
+		}
+		// clear environment
+		environment.setRenderColor(0xFF, 0xFF, 0xFF, 0XFF);
+		environment.clear();
+
+		// draw rectangle
+		drawRects();
+
+		// change velocity
+		changeRectVel();
+
+		// change x and y
+		changeRectPos();
+
+		// present environment
+		environment.present();
+	}
+
+	// clean up environment
+	environment.cleanUp();
+}