Return to Question

added 70 characters in body

Source Link

edited Oct 13, 2020 at 17:22

I want to load a vertex buffer with vertices of struct Vertex:

struct Vertex {
   Vector3 position;
   Vector3 normal;
   Vector2 uv;
   int groups[10];
   float weights[10];
};

According to khronos manual, the number of elements in vertex attributes must be 1,2,3,4. If that is the case how do I load the vertex attributes consisting of more elements, in this case 10?

Is this not valid?

  glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, sizeof(Vertex), (void*)0);
  glVertexAttribPointer(1, 3, GL_FLOAT, GL_FALSE, sizeof(Vertex), (void*)offsetof(Vertex, normal));  
  glVertexAttribPointer(2, 2, GL_FLOAT, GL_FALSE, sizeof(Vertex), (void*)offsetof(Vertex, uv));  
  glVertexAttribIPointer(3, 10, GL_INT, sizeof(Vertex), (void*)offsetof(Vertex, groups));   
  glVertexAttribPointer(4, 10, GL_FLOAT, GL_FALSE, sizeof(Vertex), (void*)offsetof(Vertex, weights));

I need groups and weight vertex attributes for skeletal deformation.

I want to load a vertex buffer with vertices of struct Vertex:

struct Vertex {
   Vector3 position;
   Vector3 normal;
   Vector2 uv;
   int groups[10];
   float weights[10];
};

According to khronos manual, the number of elements in vertex attributes must be 1,2,3,4. If that is the case how do I load the vertex attributes consisting of more elements, in this case 10?

Is this not valid?

  glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, sizeof(Vertex), (void*)0);
  glVertexAttribPointer(1, 3, GL_FLOAT, GL_FALSE, sizeof(Vertex), (void*)offsetof(Vertex, normal));  
  glVertexAttribPointer(2, 2, GL_FLOAT, GL_FALSE, sizeof(Vertex), (void*)offsetof(Vertex, uv));  
  glVertexAttribIPointer(3, 10, GL_INT, sizeof(Vertex), (void*)offsetof(Vertex, groups));   
  glVertexAttribPointer(4, 10, GL_FLOAT, GL_FALSE, sizeof(Vertex), (void*)offsetof(Vertex, weights));

I want to load a vertex buffer with vertices of struct Vertex:

struct Vertex {
   Vector3 position;
   Vector3 normal;
   Vector2 uv;
   int groups[10];
   float weights[10];
};

According to khronos manual, the number of elements in vertex attributes must be 1,2,3,4. If that is the case how do I load the vertex attributes consisting of more elements, in this case 10?

Is this not valid?

  glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, sizeof(Vertex), (void*)0);
  glVertexAttribPointer(1, 3, GL_FLOAT, GL_FALSE, sizeof(Vertex), (void*)offsetof(Vertex, normal));  
  glVertexAttribPointer(2, 2, GL_FLOAT, GL_FALSE, sizeof(Vertex), (void*)offsetof(Vertex, uv));  
  glVertexAttribIPointer(3, 10, GL_INT, sizeof(Vertex), (void*)offsetof(Vertex, groups));   
  glVertexAttribPointer(4, 10, GL_FLOAT, GL_FALSE, sizeof(Vertex), (void*)offsetof(Vertex, weights));

I need groups and weight vertex attributes for skeletal deformation.

Source Link

asked Oct 13, 2020 at 17:06

Lenny White

Max number of elements in a vertex attribute

I want to load a vertex buffer with vertices of struct Vertex:

struct Vertex {
   Vector3 position;
   Vector3 normal;
   Vector2 uv;
   int groups[10];
   float weights[10];
};

According to khronos manual, the number of elements in vertex attributes must be 1,2,3,4. If that is the case how do I load the vertex attributes consisting of more elements, in this case 10?

Is this not valid?

  glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, sizeof(Vertex), (void*)0);
  glVertexAttribPointer(1, 3, GL_FLOAT, GL_FALSE, sizeof(Vertex), (void*)offsetof(Vertex, normal));  
  glVertexAttribPointer(2, 2, GL_FLOAT, GL_FALSE, sizeof(Vertex), (void*)offsetof(Vertex, uv));  
  glVertexAttribIPointer(3, 10, GL_INT, sizeof(Vertex), (void*)offsetof(Vertex, groups));   
  glVertexAttribPointer(4, 10, GL_FLOAT, GL_FALSE, sizeof(Vertex), (void*)offsetof(Vertex, weights));

opengl