karl
4951ad3b04
Tangents are not yet used, so the normals are currently only correct for the ground.
73 lines
1.9 KiB
C++
73 lines
1.9 KiB
C++
//
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// Created by karl on 14.01.20.
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//
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#ifndef ECSGAME_TEXTURE_H
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#define ECSGAME_TEXTURE_H
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#include "../../Util/stb_image.h"
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struct Texture {
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uint id;
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uint normal_id;
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bool render_transparent = false;
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struct Settings {
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Settings(bool mipmaps) : mipmaps(mipmaps) {}
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bool mipmaps = true;
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};
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// Bind a texture from the given path and return its ID
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uint loadTexture(const std::string& path, Settings settings) {
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uint gl_id;
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glGenTextures(1, &gl_id);
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glBindTexture(GL_TEXTURE_2D, gl_id);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
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if (settings.mipmaps) {
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR);
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} else {
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
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}
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
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int width, height, nrChannels;
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unsigned char *data = stbi_load(path.c_str(), &width, &height, &nrChannels, 0);
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if (data) {
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// Alpha channel?
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unsigned int glChannels = GL_RGB;
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if (nrChannels == 4) {
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glChannels = GL_RGBA;
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}
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glTexImage2D(GL_TEXTURE_2D, 0, glChannels, width, height, 0, glChannels, GL_UNSIGNED_BYTE, data);
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if (settings.mipmaps) {
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glGenerateMipmap(GL_TEXTURE_2D);
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}
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} else {
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std::cout << "Failed to load texture" << std::endl;
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}
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stbi_image_free(data);
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return gl_id;
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}
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explicit Texture(const std::string& path, Settings settings, bool transparent) : id(loadTexture(path, settings)), render_transparent(transparent) {}
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void addNormalmap(const std::string& path, Settings settings) {
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normal_id = loadTexture(path, settings);
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}
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};
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#endif //ECSGAME_TEXTURE_H
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