使用SOIL映射纹理与OpenGL

  • Z时代
  • 2024-01-10
  • 分类：问答

尝试使用OpenGL和SOIL完成基本纹理映射到曲面，但我不生成任何东西。使用SOIL映射纹理与OpenGL

GLuint textureID[5]; 
glutInitWindowPosition(0, 50); 
windowID[0] = glutCreateWindow("orthogonal projection, cubes"); 
glMatrixMode(GL_PROJECTION); 
glLoadIdentity(); 
glOrtho(-400, 400, -400, 400, -500, 500); 
glMatrixMode(GL_MODELVIEW); 
glLoadIdentity(); 
glutKeyboardFunc(Keyboard); 
glutDisplayFunc(DrawWindowOne); 
textureID[0] = SOIL_load_OGL_texture("assets/faceA.png", 
       SOIL_LOAD_AUTO, SOIL_CREATE_NEW_ID, SOIL_FLAG_INVERT_Y); 
void DrawWindowOne() 
{ 
    glClearColor(0.0, 0.0, 0.0, 0.0); 
    glClear(GL_COLOR_BUFFER_BIT); 
    glViewport(0, 0, 250, 250); 
    glMatrixMode(GL_MODELVIEW); 
    glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE); 
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT); 
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT); 
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST); 
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST); 
    glEnable(GL_TEXTURE_2D); 
    glBindTexture(GL_TEXTURE_2D, textureID[0]); 
    glBegin(GL_QUADS); 
    glNormal3f(0.0, 0.0, 1.0); // front face 
    glTexCoord2f(0.0, 0.0);  glVertex3f(-a,-a, a); 
    glTexCoord2f(0.0, 1.0);  glVertex3f(-a, a, a); 
    glTexCoord2f(1.0, 1.0);  glVertex3f(a, a, a); 
    glTexCoord2f(1.0, 0.0);  glVertex3f(a,-a, a); 
    glEnd(); 
    glDisable(GL_TEXTURE_2D); 
}

然而，脸部绘制蓝色，我没有纹理。我有第二个窗口，在这里除了位置的唯一延异的是，我使用截，而不是正交

windowID[1] = glutCreateWindow("Perspective projection using glFrustum"); 
glMatrixMode(GL_PROJECTION); 
glLoadIdentity(); 
glFrustum(-60, 60, -60, 60, 60, 200); 
gluLookAt(0, 0, 120, 0, 0, 0, 0, 1, 0);

和纹理绘制的罚款。

回答：

问题是，我一次加载纹理，在每个窗口初始化后需要加载它们以便可用于该窗口绘制代码。

#pragma region Initialise Window One 
glutInitWindowPosition(0, 50); 
windowID[1] = glutCreateWindow("orthogonal projection, cubes"); 
glMatrixMode(GL_PROJECTION); 
glLoadIdentity(); 
glOrtho(-400, 400, -400, 400, -500, 500); 
glMatrixMode(GL_MODELVIEW); 
glLoadIdentity(); 
glutKeyboardFunc(Keyboard); 
glutDisplayFunc(DrawWindowOne); 
LoadTextures(); 
#pragma endregion 
#pragma region Initialise Window Two 
glutInitWindowPosition(0, 450); 
windowID[1] = glutCreateWindow("Perspective projection using glFrustum, ellipsoids"); 
glMatrixMode(GL_PROJECTION); 
glLoadIdentity(); 
glFrustum(-60, 60, -60, 60, 60, 200); 
gluLookAt(0, 0, 120, 0, 0, 0, 0, 1, 0); 
glMatrixMode(GL_MODELVIEW); 
glLoadIdentity(); 
glutKeyboardFunc(Keyboard); 
glutDisplayFunc(DrawWindowTwo); 
LoadTextures(); 
#pragma endregion

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