im currently in a bit of trouble with my code:
firstly, the skybox is not showing up on my screen, just a grey overlay.
Also, i cant assign one texture to different objects.
Lastly, Why is my box being cut off where it is ( yes that's a box!)
please help me,
CODE:
main.h
//Include STD headers
#ifndef MAIN_H
#define MAIN_H
#include<GL/glew.h>
#include<GL/glfw.h>
#include<GL/freeglut.h>
#include <vector>
#include<algorithm>
#include <fstream>
#include<cstdio>
#include <iostream>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <math.h>
#include <cmath>
#include <SFML/Graphics.hpp>
#include <SOIL.h>
//Include GLM
#include <glm/glm.hpp>
using namespace std;
extern GLuint loadShader(const char* vertex_file_path, const char* fragment_file_path);
extern int loadTexture(const char* texfilename,GLuint textureObject);
extern void deleteTexture(GLuint textureObject);
extern void InitializeWindow();
extern void shutdown();
#endif
skybox.h
#include "main.h"
class skybox
{
public:
void initSkybox( const char* xpos, const char* xneg, const char* ypos, const char* yneg, const char* zpos, const char* zneg);
void skyboxVBO();
void drawSkybox();
void destroySkybox();
//constants for the skybox
};
texture.cpp
#include "3dsloader.h"
int loadTexture(const char* texfilename,GLuint textureObject) //load bitmap and convert to texture
{
glGenTextures(1,&textureObject); // allocate memory for one texture
glBindTexture( GL_TEXTURE_2D,textureObject); // use our newest texture
textureObject = SOIL_load_OGL_texture(texfilename,SOIL_LOAD_AUTO,SOIL_CREATE_NEW_ID,SOIL_FLAG_MIPMAPS);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR); // give the best result for texture magnification
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR); //give the best result for texture minification
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP); // don't repeat texture
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP); // don't repeat texture
return textureObject;
}
//MAY NOT WORK PROPERLY
void deleteTexture(GLuint textureObject)
{
glDeleteTextures(1,&textureObject);
}
shader.cpp
#include "3dsloader.h"
int loadTexture(const char* texfilename,GLuint textureObject) //load bitmap and convert to texture
{
glGenTextures(1,&textureObject); // allocate memory for one texture
glBindTexture( GL_TEXTURE_2D,textureObject); // use our newest texture
textureObject = SOIL_load_OGL_texture(texfilename,SOIL_LOAD_AUTO,SOIL_CREATE_NEW_ID,SOIL_FLAG_MIPMAPS);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR); // give the best result for texture magnification
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR); //give the best result for texture minification
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP); // don't repeat texture
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP); // don't repeat texture
return textureObject;
}
//MAY NOT WORK PROPERLY
void deleteTexture(GLuint textureObject)
{
glDeleteTextures(1,&textureObject);
}
skybox.cpp
#include "skybox.h"
GLuint skyboxShaderID;
GLuint skytexture;
GLint vertex;
void skybox::initSkybox(const char* xpos, const char* xneg, const char* ypos, const char* yneg, const char* zpos, const char* zneg)
{
glActiveTexture(GL_TEXTURE0);
glEnable(GL_TEXTURE_CUBE_MAP);
glGenTextures(1,&skytexture);
skytexture = SOIL_load_OGL_cubemap(
xpos,
xneg,
ypos,
yneg,
zpos,
zneg,
SOIL_LOAD_RGB,
SOIL_CREATE_NEW_ID,
0
);
glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_WRAP_R, GL_CLAMP_TO_EDGE);
}
void skybox::destroySkybox()
{
glDeleteTextures(1, &skytexture);
}
GLuint skyboxVertexBuffer;
GLuint skyboxIndexBuffer;
void skybox::skyboxVBO()
{
glGenBuffers(1, &skyboxVertexBuffer);
glBindBuffer(GL_ARRAY_BUFFER, skyboxVertexBuffer);
GLfloat skybox_vertex_data[] =
{
-1.0, -1.0, 1.0,
1.0, -1.0, 1.0,
-1.0, 1.0, 1.0,
1.0, 1.0, 1.0,
-1.0, -1.0, -1.0,
1.0, -1.0, -1.0,
-1.0, 1.0, -1.0,
1.0, 1.0, -1.0,
};
glBufferData(GL_ARRAY_BUFFER, sizeof(skybox_vertex_data), skybox_vertex_data, GL_STATIC_DRAW);
glGenBuffers(1, &skyboxIndexBuffer);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, skyboxIndexBuffer);
GLubyte indices[14] = {0, 1, 2, 3, 7, 1, 5, 4, 7, 6, 2, 4, 0, 1};
glBufferData(GL_ELEMENT_ARRAY_BUFFER, sizeof(indices), indices, GL_STATIC_DRAW);
}
void skybox::drawSkybox()
{
glClearColor(0.5f, 0.5f, 0.5f, 1);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
skyboxShaderID = loadShader("assets/skybox/skybox.vert","assets/skybox.skybox.frag");
glUseProgram(skyboxShaderID);
glDisable(GL_DEPTH_TEST); // skybox should be drawn behind anything else
glBindTexture(GL_TEXTURE_CUBE_MAP,skytexture);
glBindBuffer(GL_ARRAY_BUFFER,skyboxVertexBuffer);
glVertexAttribPointer(skyboxShaderID, 3, GL_FLOAT, GL_FALSE, 0, (void*)0);
glEnableVertexAttribArray(skyboxShaderID);
glBindBuffer(GL_ARRAY_BUFFER, 0);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, skyboxIndexBuffer);
glDrawElements(GL_TRIANGLE_STRIP, 14, GL_UNSIGNED_BYTE, 0);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0);
glEnable(GL_DEPTH_TEST);
}
main.cpp
#include "main.h"
#include "3dsloader.h"
#include "camera.h"
#include "skybox.h"
bool mousein= false;
GLuint programID;
void lighting();
void initRendering();
void drawScene();
void mainLoop();
FPSCamera * camera;
Object* testcube;
GLuint testObjTex;
skybox* sky;
int main(int argc, char **argv)
{
bool running = true;
InitializeWindow();
sky->initSkybox("assets/skybox/citystorm/xpos.jpg","assets/skybox/citystorm/xneg.jpg","assets/skybox/citystorm/ypos.jpg","assets/skybox/citystorm/yneg.jpg","assets/skybox/citystorm/zpos.jpg","assets/skybox/citystorm/zneg.jpg");
sky->skyboxVBO();
testcube = new Object("test.3ds");
testcube->CreateVBO();
initRendering();
//shader setup
programID = loadShader("emptyshader.vert","bokehDOF.frag");
mainLoop();
return 0;
}
void initRendering()
{
glClearColor(0.0, 0.0, 0.0, 0.0);
glShadeModel(GL_SMOOTH);
glEnable(GL_TEXTURE_2D);
glEnable(GL_DEPTH_TEST);
glDepthMask(GL_TRUE);
// Enable lighting and set the position of the light
glEnable(GL_LIGHT0);
glEnable(GL_LIGHTING);
GLfloat pos[] = { 0.0, 4.0, 4.0 };
glLightfv(GL_LIGHT0, GL_POSITION, pos);
}
void mainLoop(void)
{
// the time of the previous frame
double old_time = glfwGetTime();
// this just loops as long as the program runs
while(1)
{
// KEY EVENTS 1
// escape to quit,
//use shader
glUseProgram(programID);
camera->updateCamera();
if (glfwGetKey(GLFW_KEY_ESC) == GLFW_PRESS)
break;
if (glfwGetMouseButton(GLFW_MOUSE_BUTTON_LEFT) == GLFW_PRESS)
{
mousein = true;
glfwDisable(GLFW_MOUSE_CURSOR);
}
if(glfwGetKey('P') == GLFW_PRESS)
{
mousein=false;
glfwEnable(GLFW_MOUSE_CURSOR);
}
camera->Control(0.2,0.2,mousein);
// draw the figure
drawScene();
// swap back and front buffers
glfwSwapBuffers();
}
}
void drawScene()
{
//clear info from last draw
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
//skybox for scene
sky->drawSkybox();
// ADD SCENE OBJECTS TO RENDER HERE
//model loading and stuff
glEnable(GL_TEXTURE_2D);
loadTexture("texture.jpg",testObjTex);
testcube->Draw();
glDisable(GL_TEXTURE_2D);
glLoadIdentity();
};
void shutdown()
{
glfwTerminate();
sky->destroySkybox();
delete sky;
sky= NULL;
deleteTexture(testObjTex);
delete testcube;
testcube = NULL;
delete camera;
camera = NULL;
exit(1);
}
all input is welcome as i am in a rush to get this working!
