44 lines
1.4 KiB
C++
44 lines
1.4 KiB
C++
#include <GL/glew.h>
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#include <GL/gl.h>
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#include <stb_image.h>
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#include "skybox.h"
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Skybox::Skybox(std::array<std::string, 6> faces, unsigned int format) {
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glGenTextures(1, &this->ID);
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glBindTexture(GL_TEXTURE_CUBE_MAP, this->ID);
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// stbi_set_flip_vertically_on_load(true);
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for (unsigned int i = 0; i< faces.size(); i++) {
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int width, height, nrChannels;
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unsigned char *data = stbi_load(faces[i].c_str(), &width, &height,
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&nrChannels, 0);
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if (!data) {
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printf("Failed to load texture '%s'\n", faces[i].c_str());
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abort();
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}
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glTexImage2D(GL_TEXTURE_CUBE_MAP_POSITIVE_X + i, 0, format, width, height, 0, format,
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GL_UNSIGNED_BYTE, data);
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stbi_image_free(data);
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}
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// Wrapping
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glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
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glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
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glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_WRAP_R, GL_CLAMP_TO_EDGE);
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// Interpolation
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glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
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glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
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}
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Skybox::~Skybox() {
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glDeleteTextures(1, &this->ID);
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}
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void Skybox::activate(unsigned int textureIdx) {
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glActiveTexture(GL_TEXTURE0 + textureIdx);
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glBindTexture(GL_TEXTURE_2D, this->ID);
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}
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