添加轉換后物件不渲染-有解無憂

我正在向我的 C OpenGL 程式添加轉換。我使用 CGLM 作為我的數學庫。該程式沒有警告或錯誤。然而，當我編譯并運行程式時，我只是得到一個視窗，將我的清晰顏色著色。以下是我程式的主回圈

// Initialize variables for framerate counting
double lastTime = glfwGetTime();
int frameCount = 0;

// Program loop
while (!glfwWindowShouldClose(window)) {
    // Calculate framerate
    double thisTime = glfwGetTime();
    frameCount  ;

    // If a second has passed.
    if (thisTime - lastTime >= 1.0) {
        printf("%i FPS\n", frameCount);

        frameCount = 0;
        lastTime = thisTime;
    }

    processInput(window);

    // Clear the window
    glClearColor(0.2f, 0.3f, 0.3f, 1.0f);
    glClear(GL_COLOR_BUFFER_BIT);
    
    // Bind textures on texture units
    glActiveTexture(GL_TEXTURE0);
    glBindTexture(GL_TEXTURE_2D, texture);
    glActiveTexture(GL_TEXTURE1);
    glBindTexture(GL_TEXTURE_2D, texture2);

    // Create transformations
    mat4 transform = {{1.0f}};
    glm_translate(transform, (vec3){0.5f, -0.5f, 0.0f});
    glm_rotate(transform, (float)glfwGetTime(), (vec3){0.0f, 0.0f, 1.0f});

    printf("%i\n", transform);

    // Get matrix's uniform location and set matrix
    shaderUse(myShaderPtr);
    GLint transformLoc = glGetUniformLocation(myShaderPtr->shaderID, "transform");
    printf("%i\n", transformLoc);
    glUniformMatrix4fv(transformLoc, 1, GL_FALSE, *transform);

    glBindVertexArray(VAO);
    glDrawElements(GL_TRIANGLES, 6, GL_UNSIGNED_INT, 0);

    glfwSwapBuffers(window); // Swap the front and back buffers
    glfwPollEvents(); // Check for events (mouse movement, mouse click, keyboard press, keyboard release etc.)
}

如果您想查看完整的代碼，添加轉換后物件不渲染

但是，預期的輸出是一個帶有我的個人資料圖片的旋轉框。預先感謝您的幫助。

uj5u.com熱心網友回復：

mat4 transform = {{1.0f}};不符合您的預期。C 沒有像 C 這樣的建構式。C 版本的建構式使用Identity matrix初始化矩陣。您必須使用glm_mat4_identity單位矩陣進行初始化：

mat4 transform;
glm_mat4_identity(transform);
glm_rotate(transform, (float)glfwGetTime(), (vec3){0.0f, 0.0f, 1.0f});

glUniformMatrix4fv(transformLoc, 1, GL_FALSE, (float*)transform);

此外，您需要指定并添加一個正交投影矩陣來補償視口的縱橫比：

float aspect = (float)width / (float)height;
mat4 projection;
glm_ortho(-aspect, aspect, -1.0f, 1.0f, -1.0f, 1.0f, projection)

mat4 transform;
glm_rotate(transform, (float)glfwGetTime(), (vec3){0.0f, 0.0f, 1.0f});
glm_mat4_identity(transform);

mat4 mvp;
glm_mat4_mul(projection, transform, mvp);

GLint transformLoc = glGetUniformLocation(myShaderPtr->shaderID, "transform");
glUniformMatrix4fv(transformLoc, 1, GL_FALSE, (float*)mvp);

轉載請註明出處，本文鏈接：https://www.uj5u.com/qianduan/486399.html

標籤：C linux opengl glm数学

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