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をピックアップし、私は2つのテクスチャをミックス私のコードで、OpenGLは、常にここで最初のテクスチャ
main.cppにここ
#include <iostream>
// GLEW
#include <GL/glew.h>
// GLFW
#include <GLFW/glfw3.h>
// Shader Class
#include "Shader.h"
// SOIL2 JSpartan
#include "SOIL2.h"
const int WIDTH=500, HEIGHT=600;
int main() {
// Init GLFW
glfwInit();
// Set all the required options for GLFW
glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3);
glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 3);
glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE);
glfwWindowHint(GLFW_OPENGL_FORWARD_COMPAT, GL_TRUE);
glfwWindowHint(GLFW_RESIZABLE, GL_FALSE);
// Create a GLFWwindow object that we can use for GLFW's functions
GLFWwindow *window = glfwCreateWindow(WIDTH, HEIGHT, "LearnOpenGL", nullptr, nullptr);
int screenWidth, screenHeight;
glfwGetFramebufferSize(window, &screenWidth, &screenHeight);
if (nullptr == window)
{
std::cout << "Failed to create GLFW window" << std::endl;
glfwTerminate();
return EXIT_FAILURE;
}
glfwMakeContextCurrent(window);
// Set this to true so GLEW knows to use a modern approach to retrieving function pointers and extensions
glewExperimental = GL_TRUE;
// Initialize GLEW to setup the OpenGL Function pointers
if (GLEW_OK != glewInit())
{
std::cout << "Failed to initialize GLEW" << std::endl;
return EXIT_FAILURE;
}
// Define the viewport dimensions
glViewport(0, 0, screenWidth, screenHeight);
// enable alpha support
glEnable(GL_BLEND);
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
// load shaders
Shader *ourShader = new Shader("res/shaders/core.vs","res/shaders/core.fs");
GLfloat vertices[] = {
1.0f, 1.0f, 0.0f, 1.0f, 0.0f, 0.0f, 1.0f, 1.0f, // top right corner
1.0f, -1.0f, 0.0f, 0.0f, 1.0f, 0.0f, 1.0f, 0.0f, // bottom right corner
-1.0f, -1.0f, 0.0f, 0.0f, 0.0f, 1.0f, 0.0f, 0.0f, // bottom left corner
-1.0f, 1.0f, 0.0f, 1.0f, 1.0f, 0.0f, 0.0f, 1.0f // top left corner
};
GLuint indices[] = {
0, 1, 2, // trainagle 1 right sided
2, 3, 0
};
GLuint VAO, VBO, EBO;
glGenVertexArrays(1, &VAO);
glBindVertexArray(VAO);
glGenBuffers(1, &VBO);
glBindBuffer(GL_ARRAY_BUFFER, VBO);
glBufferData(GL_ARRAY_BUFFER, sizeof(vertices), vertices, GL_STATIC_DRAW);
glGenBuffers(1, &EBO);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, EBO);
glBufferData(GL_ELEMENT_ARRAY_BUFFER, sizeof(indices), indices, GL_STATIC_DRAW);
glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 8 * sizeof(GLfloat), (GLvoid *) 0);
glEnableVertexAttribArray(0);
glVertexAttribPointer(1, 3, GL_FLOAT, GL_FALSE, 8 * sizeof(GLfloat), (GLvoid *) (3 * sizeof(GLfloat)));
glEnableVertexAttribArray(1);
glVertexAttribPointer(2, 2, GL_FLOAT, GL_FALSE, 8 * sizeof(GLfloat), (GLvoid *) (6 * sizeof(GLfloat)));
glEnableVertexAttribArray(2);
// Load textures
GLuint textures[2];
glGenTextures(2, textures);
int width, height;
unsigned char* image;
glActiveTexture(GL_TEXTURE0);
glBindTexture(GL_TEXTURE_2D, textures[0]);
image = SOIL_load_image("res/face1.jpg", &width, &height, 0, SOIL_LOAD_RGB);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, width, height, 0, GL_RGB, GL_UNSIGNED_BYTE, image);
SOIL_free_image_data(image);
glUniform1i(glGetUniformLocation(ourShader->Program, "face1"), 0);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glActiveTexture(GL_TEXTURE1);
glBindTexture(GL_TEXTURE_2D, textures[1]);
image = SOIL_load_image("res/face2.jpg", &width, &height, 0, SOIL_LOAD_RGB);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, width, height, 0, GL_RGB, GL_UNSIGNED_BYTE, image);
SOIL_free_image_data(image);
glUniform1i(glGetUniformLocation(ourShader->Program, "face2"), 1);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
//glBindVertexArray(0);
// Game loop
while (!glfwWindowShouldClose(window))
{
// Check if any events have been activiated (key pressed, mouse moved etc.) and call corresponding response functions
glfwPollEvents();
glClearColor(0.2f, 0.3f, 0.5f, 1.0f);
glClear(GL_COLOR_BUFFER_BIT);
ourShader->Use();
//glBindVertexArray(VAO);
glDrawElements(GL_TRIANGLES, 6, GL_UNSIGNED_INT, 0);
//glDrawArrays(GL_TRIANGLES, 0, 3);
// Swap the screen buffers
glfwSwapBuffers(window);
}
}
は、私の頂点シェーダです：
#version 330 core
layout (location = 0) in vec3 position;
layout (location = 1) in vec3 color;
layout (location = 2) in vec2 texCoord;
out vec3 ourColor;
out vec2 TexCoord;
void main() {
ourColor = color;
TexCoord = vec2(texCoord.x, 1-texCoord.y);
gl_Position = vec4(position.x, position.y, position.z, 1.0);
}
これはフラグメントシェーダです。
#version 330 core
in vec3 ourColor;
in vec2 TexCoord;
out vec4 color;
uniform sampler2D face1;
uniform sampler2D face2;
void main() {
vec4 colorFace1 = texture(face1, TexCoord);
vec4 colorFace2 = texture(face2, TexCoord);
color = colorFace2; //* vec4(ourColor, 1.0);;//vec4(ourColor, 1.0f);
}
今問題は、コードを実行するたびにコードが実行され、出力は常に「face1.jpg」です。私はmentioned hereのようなステップの指示に従いました。
上記のリンクでウェブサイトにアクセスした場合、プログラムの出力はこの記事に示すように2つの画像を混合する必要があります。
はあなたが確認しているプログラムユニフォームをセットするときにアクティブになっていますか？その前に正しいプログラムで 'glUseProgram'を呼び出しましたか？ – BDL
また、[tag：opengl]または[tag：opengl-es]のいずれかを選択する必要があります。両方を持つことはできません。 – BDL