✔ [C++] Textureload error "Verweis auf nicht aufgelösten externen Symbol"

[CodeCrafterCpp]

Hier der Quellcode der opengl_init.cpp:

//***** OPENGL_INIT_CPP *****//
//***** OpenGL 0.0.1 *****//

#include "stdafx.h"
#include "opengl_init.h"

using namespace std;

void OpenGL_Init::opengl_init_scene(){
	this->angle = 0.0;
	float dif[] = {1.0f, 1.0f, 1.0f, 1.0f};
	float amb[] = {0.2f, 0.2f, 0.2f, 1.0f};


	glClearColor(0.0, 0.0, 0.0, 1.0);
	glMatrixMode(GL_PROJECTION);
	glLoadIdentity();
	gluPerspective(45, 640.0/480.0, 1.0, 500.0);
	glMatrixMode(GL_MODELVIEW);
	glEnable(GL_DEPTH_TEST);
	glEnable(GL_COLOR_MATERIAL);
	glEnable(GL_TEXTURE_2D);
	tex = loadTexture("C:/Users/Jonas/Desktop/brick.bmp");

	glLoadIdentity();

}

unsigned int loadTexture(const char* filename)
{
	SDL_Surface* img = SDL_LoadBMP(filename);
	unsigned int id;
	glGenTextures(1, &id);
	glBindTexture(GL_TEXTURE_2D, id);
	glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, img->w, img->h, 
		0, GL_RGB, GL_UNSIGNED_SHORT_5_6_5, img->pixels);
	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
	SDL_FreeSurface(img);
	return id;
}


void OpenGL_Init::opengl_draw_scene(){
	if(this->angle >= 360)
		this->angle = 0.0f;
	float pos[] = {-2.0f, 2.0f,-3.0f, 1.0f};
	float size = 2.0f;


	glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
	glMatrixMode(GL_MODELVIEW);
	glLoadIdentity();

	glTranslatef(0.0, 0.0,-10.0);
	glRotatef(angle, 0.0f, 2.0f, 0.0f);
	glBindTexture(GL_TEXTURE_2D, tex);

	glBegin(GL_QUADS);
	glTexCoord2f(1.0, 1.0);
	glVertex3f(size/2, size/2, 0.0f);
	glTexCoord2f(0.0, 1.0);
	glVertex3f(-size/2, size/2, 0.0f);
	glTexCoord2f(0.0, 0.0);
	glVertex3f(-size/2,-size/2, 0.0f);
	glTexCoord2f(1.0, 0.0);
	glVertex3f(size/2,-size/2, 0.0f);
	glEnd();
	//opengl_draw_cube(size);

}

void OpenGL_Init::opengl_draw_cube(float size)
{
	glBegin(GL_QUADS);
		//front face
		glNormal3f( 0.0, 0.0, size);
		glColor3f( 1.0f, 0.0f, 0.0f);
		glVertex3f(	size/2, size/2, size/2);
		glVertex3f(-size/2, size/2, size/2);
		glVertex3f(-size/2,-size/2, size/2);
		glVertex3f(	size/2,-size/2, size/2);

		//left face
		glNormal3f( -size, 0.0, 0.0);
		glColor3f( 0.0f, 1.0, 0.0f);
		glVertex3f(-size/2, size/2, size/2);
		glVertex3f(-size/2, size/2,-size/2);
		glVertex3f(-size/2,-size/2,-size/2);
		glVertex3f(-size/2,-size/2, size/2);

		//back face
		glNormal3f( 0.0, 0.0,-size);
		glColor3f( 0.0f, 0.0f, 1.0f);
		glVertex3f(	size/2, size/2, -size/2);
		glVertex3f(-size/2, size/2, -size/2);
		glVertex3f(-size/2,-size/2, -size/2);
		glVertex3f(	size/2,-size/2, -size/2);

		//right face
		glNormal3f( size, 0.0, 0.0);
		glColor3f( 1.0f, 1.0f, 0.0f);
		glVertex3f(	size/2, size/2, size/2);
		glVertex3f( size/2, size/2,-size/2);
		glVertex3f( size/2,-size/2,-size/2);
		glVertex3f(	size/2,-size/2, size/2);

		//top face
		glNormal3f( 0.0, size, 0.0);
		glColor3f( 0.0f, 0.0f, 0.0f);
		glVertex3f(-size/2, size/2, size/2);
		glVertex3f(-size/2, size/2,-size/2);
		glVertex3f( size/2, size/2,-size/2);
		glVertex3f(	size/2, size/2, size/2);

		//bottom face
		glNormal3f( 0.0,-size, 0.0);
		glColor3f( 1.0f, 0.0f, 1.0f);
		glVertex3f(-size/2,-size/2, size/2);
		glVertex3f(-size/2,-size/2,-size/2);
		glVertex3f( size/2,-size/2,-size/2);
		glVertex3f(	size/2,-size/2, size/2);
	glEnd();



	glBegin(GL_TRIANGLES);
		//Front face
		glNormal3f(size-size, size, size);
		glColor3f( 0.0f, 1.0f, 0.0f);
		glVertex3f(	size/2, size/2, size/2);
		glVertex3f(-size/2, size/2, size/2);
		glVertex3f( size-size, size, size-size);

		//Left face
		glNormal3f( -size, size, size-size);
		glColor3f( 0.0f, 0.0f, 1.0f);
		glVertex3f(-size/2, size/2, size/2);
		glVertex3f(-size/2, size/2,-size/2);
		glVertex3f( size-size, size, size-size);

		//Right face
		glNormal3f( size, size, size-size);
		glColor3f( 1.0f, 0.0f, 1.0f);
		glVertex3f(	size/2, size/2, size/2);
		glVertex3f( size/2, size/2,-size/2);
		glVertex3f( size-size, size, size-size);

		//Back face
		glColor3f( 1.0f, 0.0f, 0.0f);
		glNormal3f(size-size, size, -size);
		glVertex3f(	size/2, size/2, -size/2);
		glVertex3f(-size/2, size/2, -size/2);
		glVertex3f( size-size, size, size-size);
	glEnd();

}

void OpenGL_Init::opengl_movement(float angle){
		this->angle += angle;
}

Aber warum ein void als Parameter im Error steht ist mir fraglich.
Im Anhang die _OpenGl und _SDL.

 

[cwriter]

Am besten wäre jetzt noch die Headerdatei.

Versuche es für's Erste mal so:

unsigned int OpenGL_Init::loadTexture(const char* filename)
{
//Code wie bisher
}

Oder mit

unsigned int loadTexture(const char* filename);

als erste Funktion, den Code musst du dann aber unten belassen.

cwriter

 

[CodeCrafterCpp]

Danke also hab ich einfach OpenGL_Init:: vergessen.

 

[cwriter]

Genau. Denn ohne das findet der Compiler zwar den Namen der Funktion, weiss aber nicht, was zu tun ist.

Gruss
cwriter