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Compute geometric normal where vertex normal is not available.

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This commit is contained in:
Syoyo Fujita
2016-08-12 18:58:34 +09:00
parent 8ca2bc0de7
commit 2ed3222bbe
1 changed files with 15 additions and 10 deletions
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25
experimental/viewer.cc
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@@ -271,16 +271,21 @@ bool LoadObjAndConvert(float bmin[3], float bmax[3], const char* filename, int n
int f0 = idx0.vn_idx; int f0 = idx0.vn_idx;
int f1 = idx1.vn_idx; int f1 = idx1.vn_idx;
int f2 = idx2.vn_idx; int f2 = idx2.vn_idx;
assert(f0 >= 0);
assert(f1 >= 0); if (f0 >= 0 && f1 >= 0 && f2 >= 0) {
assert(f2 >= 0); assert(3*f0+2 < attrib.normals.size());
assert(3*f0+2 < attrib.normals.size()); assert(3*f1+2 < attrib.normals.size());
assert(3*f1+2 < attrib.normals.size()); assert(3*f2+2 < attrib.normals.size());
assert(3*f2+2 < attrib.normals.size()); for (int k = 0; k < 3; k++) {
for (int k = 0; k < 3; k++) { n[0][k] = attrib.normals[3*f0+k];
n[0][k] = attrib.normals[3*f0+k]; n[1][k] = attrib.normals[3*f1+k];
n[1][k] = attrib.normals[3*f1+k]; n[2][k] = attrib.normals[3*f2+k];
n[2][k] = attrib.normals[3*f2+k]; }
} else {
// compute geometric normal
CalcNormal(n[0], v[0], v[1], v[2]);
n[1][0] = n[0][0]; n[1][1] = n[0][1]; n[1][2] = n[0][2];
n[2][0] = n[0][0]; n[2][1] = n[0][1]; n[2][2] = n[0][2];
} }
} else { } else {
// compute geometric normal // compute geometric normal