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kennyboy55
2026-06-17 16:06:16 +02:00
parent 0c9e91dc95
commit 6144032b88
110 changed files with 15967 additions and 0 deletions
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Skybox.cpp
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#include "cmath"
#include <GL/freeglut.h>
#include "Util.h"
#include "stb_image.h"
#include "Skybox.h"
#include <string>
#include <iostream>
enum{SKY_LEFT=0,SKY_BACK,SKY_RIGHT,SKY_FRONT,SKY_TOP,SKY_BOTTOM};
GLuint skybox[6];
Skybox::Skybox(const float &size, const std::string &folder)
{
this->size = size;
this->folder = folder;
}
Skybox::~Skybox()
{
glDeleteTextures(6, &skybox[0]);
}
void Skybox::init()
{
skybox[SKY_LEFT] = Util::loadTexture(folder + "left.png");
skybox[SKY_BACK] = Util::loadTexture(folder + "back.png");
skybox[SKY_RIGHT] = Util::loadTexture(folder + "right.png");
skybox[SKY_FRONT] = Util::loadTexture(folder + "front.png");
skybox[SKY_TOP] = Util::loadTexture(folder + "top.png");
skybox[SKY_BOTTOM] = Util::loadTexture(folder + "bottom.png");
}
void Skybox::draw()
{
glColor4f(1.0f, 1.0f, 1.0f, 1);
bool b1 = glIsEnabled(GL_TEXTURE_2D);
glDisable(GL_LIGHTING);
glDisable(GL_DEPTH_TEST);
glEnable(GL_TEXTURE_2D);
glDisable(GL_COLOR_MATERIAL);
glBindTexture(GL_TEXTURE_2D, skybox[SKY_BACK]);
glBegin(GL_QUADS);
glTexCoord2f(1,1);
glVertex3f(size / 2, size / 2, size / 2);
glTexCoord2f(0,1);
glVertex3f(-size / 2, size / 2, size / 2);
glTexCoord2f(0,0);
glVertex3f(-size / 2, -size / 2, size / 2);
glTexCoord2f(1,0);
glVertex3f(size / 2, -size / 2, size / 2);
glEnd();
glBindTexture(GL_TEXTURE_2D, skybox[SKY_LEFT]);
glBegin(GL_QUADS);
//left face
glTexCoord2f(1,1);
glVertex3f(-size / 2, size / 2, size / 2);
glTexCoord2f(0,1);
glVertex3f(-size / 2, size / 2, -size / 2);
glTexCoord2f(0,0);
glVertex3f(-size / 2, -size / 2, -size / 2);
glTexCoord2f(1,0);
glVertex3f(-size / 2, -size / 2, size / 2);
glEnd();
glBindTexture(GL_TEXTURE_2D, skybox[SKY_FRONT]);
glBegin(GL_QUADS);
//front face
glTexCoord2f(0, 1);
glVertex3f(size / 2, size / 2, -size / 2);
glTexCoord2f(1, 1);
glVertex3f(-size / 2, size / 2, -size / 2);
glTexCoord2f(1, 0);
glVertex3f(-size / 2, -size / 2, -size / 2);
glTexCoord2f(0, 0);
glVertex3f(size / 2, -size / 2, -size / 2);
glEnd();
glBindTexture(GL_TEXTURE_2D, skybox[SKY_RIGHT]);
glBegin(GL_QUADS);
//right face
glTexCoord2f(1, 1);
glVertex3f(size / 2, size / 2, -size / 2);
glTexCoord2f(0,1);
glVertex3f(size / 2, size / 2, size / 2);
glTexCoord2f(0,0);
glVertex3f(size / 2, -size / 2, size / 2);
glTexCoord2f(1, 0);
glVertex3f(size / 2, -size / 2, -size / 2);
glEnd();
glBindTexture(GL_TEXTURE_2D, skybox[SKY_TOP]);
glBegin(GL_QUADS); //top face
glTexCoord2f(0,0);
glVertex3f(size / 2, size / 2, size / 2);
glTexCoord2f(0,1);
glVertex3f(-size / 2, size / 2, size / 2);
glTexCoord2f(1,1);
glVertex3f(-size / 2, size / 2, -size / 2);
glTexCoord2f(1,0);
glVertex3f(size / 2, size / 2, -size / 2);
glEnd();
glBindTexture(GL_TEXTURE_2D, skybox[SKY_BOTTOM]);
glBegin(GL_QUADS);
//bottom face
glTexCoord2f(0,1);
glVertex3f(size / 2, -size / 2, size / 2);
glTexCoord2f(0,0);
glVertex3f(-size / 2, -size / 2, size / 2);
glTexCoord2f(1,0);
glVertex3f(-size / 2, -size / 2, -size / 2);
glTexCoord2f(1,1);
glVertex3f(size / 2, -size / 2, -size / 2);
glEnd();
glEnable(GL_LIGHTING); //turn everything back, which we turned on, and turn everything off, which we have turned on.
glEnable(GL_DEPTH_TEST);
if (!b1)
glDisable(GL_TEXTURE_2D);
}
GLuint Skybox::loadTexture(const std::string & fileName) //load the filename named texture
{
int width, height, bpp;
stbi_set_flip_vertically_on_load(true);
unsigned char* imgData = stbi_load(fileName.c_str(), &width, &height, &bpp, 4);
GLuint num;
glGenTextures(1, &num);
glBindTexture(GL_TEXTURE_2D, num);
glTexImage2D(GL_TEXTURE_2D,
0, //level
GL_RGBA, //internal format
width, //width
height, //height
0, //border
GL_RGBA, //data format
GL_UNSIGNED_BYTE, //data type
imgData); //data
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP);
stbi_image_free(imgData);
return num;
}