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#include<iostream>
#include<glad/glad.h>
#include<GLFW/glfw3.h>

static void keyCallBack(GLFWwindow* window, int key, int scancode, int action, int 
mods);
GLfloat vertices[] =
{//  COORDINATES     /        COLORS  
-.5f, -.5f, 0.0f,      0.8f, 0.3f, 0.02f,
0.5f, -.5f, 0.0f,      0.8f, 0.3f, 0.02f,
-.5f, .5f, 0.0f,       0.8f, 0.7f, 1.0f,
};

int main() {
{...}
GLFWwindow* window = glfwCreateWindow(400, 300, "Test-Window", NULL, NULL);
glfwSetKeyCallback(window, keyCallBack);

while (!glfwWindowShouldClose(window)) {
    glClearColor(0.07f, 0.13f, 0.17f, 1.0f);
    glClear(GL_COLOR_BUFFER_BIT);
    {...}
    
    glDrawArrays(GL_TRIANGLES, 0, 3);   

    glfwSwapBuffers(window);
    glfwPollEvents();
    
    }
}

static void keyCallBack(GLFWwindow* window, int key, int scancode, int action, int mods) {
if (key == GLFW_KEY_UP && action == GLFW_PRESS) {
        vertices[1] = vertices[1] + .1f;
        vertices[7] = vertices[7] + .1f; 
        vertices[13] = vertices[13] + .1f;
    }
if (key == GLFW_KEY_LEFT && action == GLFW_PRESS){
        {...}//shift vertices left
    }
{...} //shift vertex points right and down

}

键回调函数正在工作，因为当按下相应的箭头键时，数组内的坐标会发生变化。如何将三角形图像更新为窗口上的新坐标。

输出形状

我按照你们中的一些人的建议使用了 glm 矩阵，这似乎有效。

更新代码：

GLfloat l(0.0f), m(0.0f), n(0.0f);
int main() {
{...}
while (!glfwWindowShouldClose(window)) {
     {...}
    
    glm::mat4 transform(1);
    transform = glm::translate(transform, glm::vec3(l, m, n));
    {...}
 }
 static void keyCallBack(GLFWwindow* window, int key, int scancode, int action, int mods) {
   if (key == GLFW_KEY_UP && action == GLFW_PRESS) {
         m = m + 0.01f;
   }
   {...} //other keys

}

使用全局变量可能不是最佳实践，但我不知道如何操作转换，因为回调函数不接受预定义输入以外的变量

4

0 回答 0