OpenGL 使纹理按比例放大而不是钳位

Question

I have a texture in a game that clamps to the edge instead of linearly scaling up. These are the parameters I'm providing OpenGL with:

glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EGDE);

How should I change them in order to make the texture scale up?

These are the vertices I'm giving OpenGL:

typedef struct{
  float positionX;
  float positionY;
  float textureX ;
  float textureY ;
} textureVertex;

textureVertex vertices[4] = {
      {-3.5f,  3.5f, -1.0f,  1.0f},
      {-3.5f, -3.5f, -1.0f, -1.0f},
      { 3.5f, -3.5f,  1.0f, -1.0f},
      { 3.5f,  3.5f,  1.0f,  1.0f}
    };

Answer 1

You should specify texture coordinates for your vertices. CLAMP just tells OpenGL what to do when the coordinates go outside the range 0 -> 1. It does not say where that range is .