void
_set_default_sphere(Evas_Canvas3D_Mesh *mesh,
int frame,
int p,
Evas_Vec2 tex_scale)
{
int vcount, icount, vccount, i, j;
icount = p * p * 6;
vccount = p + 1;
vcount = vccount * vccount;
ALLOCATE_VERTEX_DATA
double dtheta, dfi, sinth, costh, fi, theta, sinfi, cosfi;
dtheta = M_PI / p;
dfi = 2 * M_PI / p;
for (j = 0; j < vccount; j++)
{
theta = j * dtheta;
sinth = sin(theta);
costh = cos(theta);
for (i = 0; i < vccount; i++)
{
fi = i * dfi;
sinfi = sin(fi);
cosfi = cos(fi);
normals[i + j * vccount].x = sinth * sinfi;
normals[i + j * vccount].y = sinth * cosfi;
normals[i + j * vccount].z = costh;
vertices[i + j * vccount].x = normals[i + j * vccount].x / 2;
vertices[i + j * vccount].y = normals[i + j * vccount].y / 2;
vertices[i + j * vccount].z = normals[i + j * vccount].z / 2;
tangents[i + j * vccount].x = -sinth * cosfi;
tangents[i + j * vccount].y = sinth * sinfi;
tangents[i + j * vccount].z = 0;
_primitives_vec3_normalize(&tangents[i + j * vccount]);
tex_coord[i + j * vccount].x = i / (float)(vccount - 1) * tex_scale.x;
tex_coord[i + j *vccount].y = tex_scale.y - j / (float)(vccount - 1) * tex_scale.y;
}
}
_generate_indices(indices, p, p);
SET_VERTEX_DATA(frame)
}
void
evas_model_set_from_torus_primitive(Evas_Canvas3D_Mesh *mesh,
int frame,
Evas_Real ratio,
int p,
Eina_Vector2 tex_scale)
{
int vcount, icount, vccount, i, j;
icount = p * p * 6;
vccount = p + 1;
vcount = vccount * vccount;
ALLOCATE_VERTEX_DATA
double d, sinth, costh, fi, theta, sinfi, cosfi;
d = 2 * M_PI / p;
float rratio;
if ((ratio < 1.0))
{
printf("Ratio of torus should be greater than or equal 1.0.\n");
printf("Ratio = %f is a bad value, so 3.0 is used like default ratio.\n",
ratio);
rratio = 1.0 / 3.0;
}
else
{
rratio = 1.0 / ratio;
}
for (j = 0; j < vccount; j++)
{
theta = j * d;
sinth = sin(theta);
costh = cos(theta);
for (i = 0; i < vccount; i++)
{
fi = i * d;
sinfi = sin(fi);
cosfi = cos(fi);
vertices[i + j * vccount].x = (1.0 - rratio + rratio * cosfi) * costh * 0.5;
vertices[i + j * vccount].y = (1.0 - rratio + rratio * cosfi) * sinth * 0.5;
vertices[i + j * vccount].z = rratio * sinfi * 0.5;
normals[i + j * vccount].x = cosfi * costh;
normals[i + j * vccount].y = cosfi * sinth;
normals[i + j * vccount].z = sinfi;
tangents[i + j * vccount].x = -sinfi * costh;
tangents[i + j * vccount].y = -sinfi * sinth;
tangents[i + j * vccount].z = cosfi;
_primitives_vec3_normalize(&normals[i + j * vccount]);
tex_coord[i + j * vccount].x = i / (float)(vccount - 1) * tex_scale.x;
tex_coord[i + j *vccount].y = tex_scale.y - j / (float)(vccount - 1) * tex_scale.y;
}
}
_generate_indices(indices, p, p);
SET_VERTEX_DATA(frame)
}
