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Reversed Y-coordinate, to reflect usual orientation of images

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This commit is contained in:
Josh Yelon 2006-07-31 16:24:44 +00:00
parent 376e11fdfd
commit 87c7e59646
1 changed files with 2 additions and 2 deletions
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4
panda/src/grutil/heightfieldTesselator.cxx
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@ -88,14 +88,14 @@ get_vertex(int x, int y) {
if (px >= _heightfield.get_x_size()) px--;
if (py >= _heightfield.get_y_size()) py--;
double drx = _heightfield.get_gray(px,y) - _heightfield.get_gray(nx,y);
double dry = _heightfield.get_gray(x,py) - _heightfield.get_gray(x,ny);
double dry = _heightfield.get_gray(x,ny) - _heightfield.get_gray(x,py);
LVector3f normal(drx * _vertical_scale * 0.5, dry * _vertical_scale * 0.5, _horizontal_scale);
normal.normalize();
double z = _heightfield.get_gray(x,y);
if (z > 2.0) {
cerr << "What the heck?";
}
_vertex_writer->add_data3f(x*_horizontal_scale,y*_horizontal_scale,z*_vertical_scale);
_vertex_writer->add_data3f(x*_horizontal_scale,-y*_horizontal_scale,z*_vertical_scale);
_normal_writer->add_data3f(normal);
vtx = _next_index++;
_dirty_vertices[vtx] = x+y*xsize;