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OpenGL code won't complie LNK2019
/////
// error code
Error 2 error LNK2019: unresolved external symbol "public: __thiscall Color::Color(void)" (??0Color@@QAE@XZ) referenced in function "public: __thiscall ColorChangeCode::ColorChangeCode(void)" (??0ColorChangeCode@@QAE@XZ) C:\Users\O\Desktop\SloanP1\SloanP1v2\SloanP1v2\ColorChangeCode.obj
//Driver//
// BounceDriver.cpp
#include <windows.h> // Must have for Windows platform builds
#include <gl\gl.h> // Microsoft OpenGL headers (version 1.1 by themselves)
#include <gl\glu.h> // OpenGL Utilities
#include <gl\glut.h> // Glut (Free-Glut on Windows)
#include "Bounce.h"
#include "Color.h" <- keep in mind the program will compile without
color or colorchangecode included
#include "ColorChangeCode.h" <- where the above error reports the problem
seems to be in the constructor()
using namespace std;
GLfloat x = 0.0f;
GLfloat y = 0.0f;
GLfloat rsize = 25;
GLfloat xstep = 1.0f;
GLfloat ystep = 1.0f;
GLfloat windowWidth;
GLfloat windowHeight;
////////
// Main program entry point
int main(int argc, char* argv[])
{
glutInit(&argc, argv);
glutInitDisplayMode(GLUT_DOUBLE | GLUT_RGBA);
glutInitWindowSize(500,500);
glutCreateWindow("Ryan Sloan - SloanP1");
glutDisplayFunc(RenderScene);
glutReshapeFunc(ChangeSize);
glutTimerFunc(33, TimerFunction, 1);
SetupRC();
glutMainLoop();
return 0;
}
/////////
//Bounce.cpp
//windows.h gl glu and glut included
#include "ColorChangeCode.h"
#include "Color.h"
#include "Bounce.h"
using namespace std;
extern GLfloat x;
extern GLfloat y;
extern GLfloat rsize;
extern GLfloat xstep;
extern GLfloat ystep;
extern GLfloat windowWidth;
extern GLfloat windowHeight;
GLfloat sizeOfTeapot = 15.0f;
void RenderScene(void)
{
glClear(GL_COLOR_BUFFER_BIT);
//Draw Grey rectangle at +/-200
glColor3f(.50, .50, .50);
glRecti(-200, 200, 200, -200);
//Draw white rectangle at +/-100
glColor3f(1.0f, 1.0f, 1.0f);
glRecti(-100, 100, 100, -100);
//Set drawing color
// R G B
glColor3f(1.0f, 0.5f, 0.0f);
//draws a orange teapot
glutWireTeapot(sizeOfTeapot);
//set drawing color
// Set current drawing color to blue
// R G B
glColor3f(0.0f, 0.0f, 1.0f);
// Draw a filled rectangle with current color
glRectf(x, y, x + rsize, y - rsize);
glColor3f(0.5f, 0.5f, 0.5f);
glLineWidth(1.5);
glBegin(GL_LINES);
//x and y axis
glVertex3f(0.0, 200, 0.0);
glVertex3f(0.0, -200, 0.0);
glVertex3f(200, 0.0, 0.0);
glVertex3f(-200, 0.0, 0.0);
glEnd();
glutSwapBuffers();
}
//
void TimerFunction(int value)
{
GLfloat windowWidth = 100, windowHeight = 100;
if(x > windowWidth-rsize || x < -windowWidth)
xstep = -xstep;
if(y > windowHeight || y < -windowHeight + rsize)
ystep = -ystep;
// Actually move the square
x += xstep;
y += ystep;
if(x > (windowWidth-rsize + xstep))
x = windowWidth-rsize-1;
else if(x < -(windowWidth + xstep))
x = -windowWidth -1;
if(y > (windowHeight + ystep))
y = windowHeight-1;
else if(y < -(windowHeight - rsize + ystep))
y = -windowHeight + rsize - 1;
// add mouse check here
glutMouseFunc(ChangeColorOrSpeed); <- where the action is,
colorchangecode is declared
inside of
changeColorOrSpeed
glutPostRedisplay();
glutTimerFunc(33,TimerFunction, 1);
}
void SetupRC(void)
{
glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
}
void ChangeSize(int w, int h)
{
GLfloat aspectRatio;
// Prevent a divide by zero
if(h == 0)
h = 1;
// Set Viewport to window dimensions
glViewport(0, 0, w, h);
// Reset coordinate system
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
// Establish clipping volume (left, right, bottom, top, near, far)
aspectRatio = (GLfloat)w / (GLfloat)h;
if (w <= h)
{
windowWidth = 100;
windowHeight = 100 / aspectRatio;
glOrtho (-100.0, 100.0, -windowHeight, windowHeight, 1.0, -1.0);
}
else
{
windowWidth = 100 * aspectRatio;
windowHeight = 100;
glOrtho (-windowWidth, windowWidth, -100.0, 100.0, 1.0, -1.0);
}
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
}
void ChangeColorOrSpeed(GLint button, GLint state, GLint x, GLint y)
{
ColorChangeCode execute;
static GLint indeXA = 0;
if(button == GLUT_LEFT_BUTTON && state == GLUT_DOWN ){
glBegin(GL_POLYGON);
//cycle through the colors;
glColor3f(execute.colors[indeXA].getR(),
execute.colors[indeXA].getG(),
execute.colors[indeXA].getB());
// Draw a filled rectangle with current color
glRecti(x, y, x + rsize, y - rsize);
glEnd();
++indeXA;
if (indeXA == 6){
indeXA = 0;
}
}
}
//ColorChangeCode.h
//windows.h, gl, glu,and glut were all included
#include "Color.h"
using namespace std;
#ifndef _COLORCHANGECODE_H
#define _COLORCHANGECODE_H
class ColorChangeCode : public Color {
public:
Color* colors; <------------------ I think the problem is here.
When I comment out this class and
the color class it will compile.
Otherwise, I get LNK2019
ColorChangeCode();
~ColorChangeCode(){ delete[] colors;}
};
#endif
////
//ColorChangeCode.cpp
//windows.h, gl, glu,and glut were all included
#include "Color.h"
#include "ColorChangeCode.h"
ColorChangeCode::ColorChangeCode()
{
colors = new Color[6];
colors[0].setRed();
colors[1].setOrange();
colors[2].setYellow();
colors[3].setGreen();
colors[4].setBlue();
colors[5].setPurple();
}
//Color.h
//windows.h, gl, glu,and glut were all included
#ifndef _COLOR_H
#define _COLOR_H
class Color {
GLfloat R;
GLfloat G;
GLfloat B;
public:
Color();
void setRed();
void setOrange();
void setYellow();
void setGreen();
void setBlue();
void setPurple();
GLfloat getR(){return R;}
GLfloat getG(){return G;}
GLfloat getB(){return B;}
};
#endif
///////////////////////////////////
//Color.cpp
//windows.h, gl, glu,and glut were all included
#include "Color.h"
void Color::setRed(){
R = 1.0f;
G = 0.0f;
B = 0.0f;
}
void Color::setOrange(){
R = 1.0f;
G = .50f;
B = 0.0f;
}
void Color::setYellow(){
R = .50f;
G = 1.0f;
B = .50f;
}
void Color::setGreen(){
R = 0.0f;
G = .50f;
B = 1.0f;
}
void Color::setBlue(){
R = 0.0f;
G = 0.0f;
B = 1.0f;
}
void Color::setPurple(){
R = 0.0f;
G = 0.0f;
B = .50f;
}
Any help you can give to shed some light on why it will not compile when colorchangecode and color are included and instanciated. Thanks
// error code
Error 2 error LNK2019: unresolved external symbol "public: __thiscall Color::Color(void)" (??0Color@@QAE@XZ) referenced in function "public: __thiscall ColorChangeCode::ColorChangeCode(void)" (??0ColorChangeCode@@QAE@XZ) C:\Users\O\Desktop\SloanP1\SloanP1v2\SloanP1v2\ColorChangeCode.obj
//Driver//
// BounceDriver.cpp
#include <windows.h> // Must have for Windows platform builds
#include <gl\gl.h> // Microsoft OpenGL headers (version 1.1 by themselves)
#include <gl\glu.h> // OpenGL Utilities
#include <gl\glut.h> // Glut (Free-Glut on Windows)
#include "Bounce.h"
#include "Color.h" <- keep in mind the program will compile without
color or colorchangecode included
#include "ColorChangeCode.h" <- where the above error reports the problem
seems to be in the constructor()
using namespace std;
GLfloat x = 0.0f;
GLfloat y = 0.0f;
GLfloat rsize = 25;
GLfloat xstep = 1.0f;
GLfloat ystep = 1.0f;
GLfloat windowWidth;
GLfloat windowHeight;
////////
// Main program entry point
int main(int argc, char* argv[])
{
glutInit(&argc, argv);
glutInitDisplayMode(GLUT_DOUBLE | GLUT_RGBA);
glutInitWindowSize(500,500);
glutCreateWindow("Ryan Sloan - SloanP1");
glutDisplayFunc(RenderScene);
glutReshapeFunc(ChangeSize);
glutTimerFunc(33, TimerFunction, 1);
SetupRC();
glutMainLoop();
return 0;
}
/////////
//Bounce.cpp
//windows.h gl glu and glut included
#include "ColorChangeCode.h"
#include "Color.h"
#include "Bounce.h"
using namespace std;
extern GLfloat x;
extern GLfloat y;
extern GLfloat rsize;
extern GLfloat xstep;
extern GLfloat ystep;
extern GLfloat windowWidth;
extern GLfloat windowHeight;
GLfloat sizeOfTeapot = 15.0f;
void RenderScene(void)
{
glClear(GL_COLOR_BUFFER_BIT);
//Draw Grey rectangle at +/-200
glColor3f(.50, .50, .50);
glRecti(-200, 200, 200, -200);
//Draw white rectangle at +/-100
glColor3f(1.0f, 1.0f, 1.0f);
glRecti(-100, 100, 100, -100);
//Set drawing color
// R G B
glColor3f(1.0f, 0.5f, 0.0f);
//draws a orange teapot
glutWireTeapot(sizeOfTeapot);
//set drawing color
// Set current drawing color to blue
// R G B
glColor3f(0.0f, 0.0f, 1.0f);
// Draw a filled rectangle with current color
glRectf(x, y, x + rsize, y - rsize);
glColor3f(0.5f, 0.5f, 0.5f);
glLineWidth(1.5);
glBegin(GL_LINES);
//x and y axis
glVertex3f(0.0, 200, 0.0);
glVertex3f(0.0, -200, 0.0);
glVertex3f(200, 0.0, 0.0);
glVertex3f(-200, 0.0, 0.0);
glEnd();
glutSwapBuffers();
}
//
void TimerFunction(int value)
{
GLfloat windowWidth = 100, windowHeight = 100;
if(x > windowWidth-rsize || x < -windowWidth)
xstep = -xstep;
if(y > windowHeight || y < -windowHeight + rsize)
ystep = -ystep;
// Actually move the square
x += xstep;
y += ystep;
if(x > (windowWidth-rsize + xstep))
x = windowWidth-rsize-1;
else if(x < -(windowWidth + xstep))
x = -windowWidth -1;
if(y > (windowHeight + ystep))
y = windowHeight-1;
else if(y < -(windowHeight - rsize + ystep))
y = -windowHeight + rsize - 1;
// add mouse check here
glutMouseFunc(ChangeColorOrSpeed); <- where the action is,
colorchangecode is declared
inside of
changeColorOrSpeed
glutPostRedisplay();
glutTimerFunc(33,TimerFunction, 1);
}
void SetupRC(void)
{
glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
}
void ChangeSize(int w, int h)
{
GLfloat aspectRatio;
// Prevent a divide by zero
if(h == 0)
h = 1;
// Set Viewport to window dimensions
glViewport(0, 0, w, h);
// Reset coordinate system
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
// Establish clipping volume (left, right, bottom, top, near, far)
aspectRatio = (GLfloat)w / (GLfloat)h;
if (w <= h)
{
windowWidth = 100;
windowHeight = 100 / aspectRatio;
glOrtho (-100.0, 100.0, -windowHeight, windowHeight, 1.0, -1.0);
}
else
{
windowWidth = 100 * aspectRatio;
windowHeight = 100;
glOrtho (-windowWidth, windowWidth, -100.0, 100.0, 1.0, -1.0);
}
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
}
void ChangeColorOrSpeed(GLint button, GLint state, GLint x, GLint y)
{
ColorChangeCode execute;
static GLint indeXA = 0;
if(button == GLUT_LEFT_BUTTON && state == GLUT_DOWN ){
glBegin(GL_POLYGON);
//cycle through the colors;
glColor3f(execute.colors[indeXA].getR(),
execute.colors[indeXA].getG(),
execute.colors[indeXA].getB());
// Draw a filled rectangle with current color
glRecti(x, y, x + rsize, y - rsize);
glEnd();
++indeXA;
if (indeXA == 6){
indeXA = 0;
}
}
}
//ColorChangeCode.h
//windows.h, gl, glu,and glut were all included
#include "Color.h"
using namespace std;
#ifndef _COLORCHANGECODE_H
#define _COLORCHANGECODE_H
class ColorChangeCode : public Color {
public:
Color* colors; <------------------ I think the problem is here.
When I comment out this class and
the color class it will compile.
Otherwise, I get LNK2019
ColorChangeCode();
~ColorChangeCode(){ delete[] colors;}
};
#endif
////
//ColorChangeCode.cpp
//windows.h, gl, glu,and glut were all included
#include "Color.h"
#include "ColorChangeCode.h"
ColorChangeCode::ColorChangeCode()
{
colors = new Color[6];
colors[0].setRed();
colors[1].setOrange();
colors[2].setYellow();
colors[3].setGreen();
colors[4].setBlue();
colors[5].setPurple();
}
//Color.h
//windows.h, gl, glu,and glut were all included
#ifndef _COLOR_H
#define _COLOR_H
class Color {
GLfloat R;
GLfloat G;
GLfloat B;
public:
Color();
void setRed();
void setOrange();
void setYellow();
void setGreen();
void setBlue();
void setPurple();
GLfloat getR(){return R;}
GLfloat getG(){return G;}
GLfloat getB(){return B;}
};
#endif
///////////////////////////////////
//Color.cpp
//windows.h, gl, glu,and glut were all included
#include "Color.h"
void Color::setRed(){
R = 1.0f;
G = 0.0f;
B = 0.0f;
}
void Color::setOrange(){
R = 1.0f;
G = .50f;
B = 0.0f;
}
void Color::setYellow(){
R = .50f;
G = 1.0f;
B = .50f;
}
void Color::setGreen(){
R = 0.0f;
G = .50f;
B = 1.0f;
}
void Color::setBlue(){
R = 0.0f;
G = 0.0f;
B = 1.0f;
}
void Color::setPurple(){
R = 0.0f;
G = 0.0f;
B = .50f;
}
Any help you can give to shed some light on why it will not compile when colorchangecode and color are included and instanciated. Thanks
Use code tags !!!111 please!
That line calls the constructor of class Color
You have declared that constructor in class Color:
but you haven't defined it in cpp
That line calls the constructor of class Color
colors = new Color[6]; You have declared that constructor in class Color:
Color();but you haven't defined it in cpp
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