Elysian Shadows

K-Bal wrote:What are your triangle coordinates? What is your camera position?

Benjamin100 wrote:So if the near and far are positive with this projection matrix, I presume I should place my triangle on a positive location on the z axis? (which is odd because the camera SHOULD be looking in the negative direction. This is a bit odd.) But when I do this and I run through it on paper, I end up dividing by w and getting a final positive number for Z, which obviously shouldn't show. But if I place a vertex in the negative location, then it is outside of the positive area that is supposed to show.

Benjamin100 wrote: B) I needed to transpose the model matrix, and yet not transpose the projection matrix... Even though both were made using arrays in what looks to me like the same form.
Does that even sort of make sense?

GLfloat matrix[16] = {
    1.0f, 0.0f, 0.0f, 2.0f,
    0.0f, 1.0f, 0.0f, 3.0f,
    0.0f, 0.0f, 1.0f, 4.0f,
    0.0f, 0.0f, 0.0f, 1.0f
};

1 0 0 0
0 1 0 0
0 0 1 0
2 3 4 1

GLfloat matrix[16] = {
    1.0f, 0.0f, 0.0f, 0.0f,
    0.0f, 1.0f, 0.0f, 0.0f,
    0.0f, 0.0f, 1.0f, 0.0f,
    2.0f, 3.0f, 4.0f, 1.0f
};

graphene_matrix_t *
graphene_matrix_init_translate (graphene_matrix_t        *m,
                                const graphene_point3d_t *p)
{
  m->value =
    graphene_simd4x4f_init (graphene_simd4f_init (1.0f, 0.0f, 0.0f, 0.0f),
                            graphene_simd4f_init (0.0f, 1.0f, 0.0f, 0.0f),
                            graphene_simd4f_init (0.0f, 0.0f, 1.0f, 0.0f),
                            graphene_simd4f_init (p->x, p->y, p->z, 1.0f));

  return m;
}