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evas: surface primitive is normalized in Evas_3D examples. 

Reviewers: cedric, Hermet, raster

Subscribers: cedric

Differential Revision: https://phab.enlightenment.org/D2341

Signed-off-by: Cedric BAIL <cedric@osg.samsung.com>
This commit is contained in:
Bogdan Devichev 2015-04-15 17:02:25 +02:00 committed by Cedric BAIL
parent b803714e40
commit fe674b160f
1 changed files with 33 additions and 0 deletions
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33
src/examples/evas/evas-3d-primitives.c
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@ -382,6 +382,38 @@ evas_3d_add_sphere_frame(Eo *mesh, int frame, int p, vec2 tex_scale)
SET_VERTEX_DATA(frame)
}
void
_normalize(vec3 *vertices, vec3 *normals, int vcount)
{
int i;
vec3 min, max;
min = max = vertices[0];
#define CHECK_MIN_AND_MAX(coord) \
if (min.coord > vertices[i].coord) \
min.coord = vertices[i].coord; \
else if (max.coord < vertices[i].coord) \
max.coord = vertices[i].coord;
for (i = 1; i < vcount; i++)
{
CHECK_MIN_AND_MAX(x)
CHECK_MIN_AND_MAX(y)
CHECK_MIN_AND_MAX(z)
}
#undef CHECK_MIN_AND_MAX
for (i = 0; i < vcount; i++)
{
vertices[i].x = (vertices[i].x - min.x) / (max.x - min.x) - 0.5;
vertices[i].y = (vertices[i].y - min.y) / (max.y - min.y) - 0.5;
vertices[i].z = (vertices[i].z - min.z) / (max.z - min.z) - 0.5;
normals[i].x = normals[i].x / (max.x - min.x);
normals[i].y = normals[i].y / (max.y - min.y);
normals[i].z = normals[i].z / (max.z - min.z);
}
}
void
evas_3d_add_func_surface_frame(Eo *mesh, int frame, Surface func, int p, vec2 tex_scale)
{
@ -413,6 +445,7 @@ evas_3d_add_func_surface_frame(Eo *mesh, int frame, Surface func, int p, vec2 te
}
}
_normalize(vertices, normals, vcount);
_generate_grid_indices(indices, p);
SET_VERTEX_DATA(frame)
}