TheGameCreators - CodeBase - Simple use of classes

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Category: Complete Applications

Version: 1.0

Information

Uploaded: 29th Nov 2010 17:27

Modified: 30th Nov 2010 14:01

Author: WLGfx

Summary

A little upgrade to the spinning cube but using the c++ class structure.

Full Description

This program doesn't use a constructor as each object is initialised once within a simple loop then each one is updated within the main loop. The destructor is used to delete the objects when it exits. Also added camera movement using the mouse in free flight mode using another simple class...

C++ Source Code

` This code was downloaded from The Game Creators

` It is reproduced here with full permission

` http://www.thegamecreators.com

******************** MAIN.CPP

#include <time.h>

#include "DarkGDK.h"

#include "orbitclass.h"

#include "mycam.h"

#define MAX_OBJS 500

SObject myobjects[MAX_OBJS];

myCam cam;

void DarkGDK ( void )

{

int loop;

dbSyncOn();

dbSetAmbientLight(30);

dbPositionLight(0,250,250,250);

dbSetLightRange(0,1000);

dbMakeLight(1);

dbPositionLight(1,-250,-250,-250);

dbSetLightRange(1,1000);

srand(time(NULL));

// initialise a random seed value based on current time

for (loop=0; loop<MAX_OBJS; loop++) {

myobjects[loop].init(loop+1);

}

dbSyncRate (60);

while ( LoopGDK() )

{

for (loop=0; loop<MAX_OBJS; loop++) {

myobjects[loop].update();

}

cam.update();

dbSync();

}

return;

}

******************** ORBITCLASS.H

class SObject {

int object;

// centre of objects orbit

double centrex, centrey, centrez;

// radius of objects orbit

double radiusx, radiusy, radiusz;

// speed of objects orbit

double orbitsx, orbitsy, orbitsz;

// start values

double currx  , curry  , currz  ;

double rotx   , roty   , rotz   ;

double rotxsp , rotysp , rotzsp ;

public:

void init(int a) {

object=a;

// initialise the centre of the orbit

centrex=(double) (rand() % 200) - 100;

centrey=(double) (rand() % 200) - 100;

centrez=(double) (rand() % 200) - 100;

// initialise the object orbit radius

radiusx=(double) (rand() % 1000) - 500;

radiusy=(double) (rand() % 1000) - 500;

radiusz=(double) (rand() % 1000) - 500;

// setup speed of each orbits axis

orbitsx=( (double) (rand() % 200) - 100 ) / 100 * 2;

orbitsy=( (double) (rand() % 200) - 100 ) / 100 * 2;

orbitsz=( (double) (rand() % 200) - 100 ) / 100 * 2;

// setup speed of each orbits axis

rotxsp =( (double) (rand() % 200) - 100 ) / 100 * 2;

rotysp =( (double) (rand() % 200) - 100 ) / 100 * 2;

rotzsp =( (double) (rand() % 200) - 100 ) / 100 * 2;

// create a sphere

dbMakeObjectCube(a, (float) (rand() % 50));

dbColorObject(a, (rand()%255)<<16 + (rand()%255)<<8 + (rand()%255));

dbSetObjectSmoothing(a,0);

dbSetObjectLight(a,1);

dbSetObjectSpecular(a,0xFFFFFF);

dbSetObjectSpecularPower(a,100);

// set current values to zero

currx=curry=currz=rotx=roty=rotz=0;

}

~SObject() {

dbDeleteObject(object);

}

void update() {

currx=dbWrapValue(currx+orbitsx);

curry=dbWrapValue(curry+orbitsy);

currz=dbWrapValue(currz+orbitsz);

rotx=dbWrapValue(rotx+rotxsp);

roty=dbWrapValue(roty+rotysp);

rotz=dbWrapValue(rotz+rotzsp);

dbPositionObject(object,centrex + (radiusx * dbSIN(currx)),

centrey + (radiusy * dbSIN(curry)),

centrez + (radiusz * dbSIN(currz)));

dbRotateObject(object, rotx, roty, rotz);

}

};

******************** MYCAM.H

// My camera controls

class myCam {

float movesp;

public:

myCam() {

movesp=0;

}

void update() {

int mc=dbMouseClick();

switch (mc) {

case 1:

if (movesp<10) { movesp++; }

break;

case 2:

if (movesp>-10) {movesp--; }

}

dbRollCameraRight(dbMouseMoveX());

dbPitchCameraUp(dbMouseMoveY());

dbMoveCamera(movesp);

if (movesp<0) {movesp+=0.5;}

if (movesp>0) {movesp-=0.5;}

}

};

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Author Name:	WLGfx
CodeBase Entries:	2

CodeBase - Simple use of classes