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Tuned polygon generation to sort the triangles for nicer gradients

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This commit is contained in:
Perttu Ahola 2011-04-24 21:54:04 +03:00
parent f2349ec5df
commit 6edb8c567c
1 changed files with 12 additions and 45 deletions
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57
src/mapblock.cpp
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@ -618,50 +618,6 @@ void updateFastFaceRow(
makeFastFace(tile, lights[0], lights[1], lights[2], lights[3],
sp, face_dir_corrected, scale,
posRelative_f, dest);
#if 0
// First node
v3s16 p_first = p_corrected - (continuous_tiles_count-1)
* translate_dir;
v3s16 p_map_leftmost;
v3s16 p_map_rightmost;
p_map_leftmost = p_corrected + blockpos_nodes;
p_map_rightmost = p_first + blockpos_nodes;
/*if(p != p_corrected)
{
if(face_dir == v3s16(0,0,1))
{
v3s16 orig_leftmost = p_map_leftmost;
v3s16 orig_rightmost = p_map_leftmost;
p_map_leftmost = orig_rightmost;
p_map_rightmost = orig_leftmost;
}
}*/
if(smooth_lighting == false)
{
li0 = li1 = li2 = li3 = decode_light(light);
}
else
{
v3s16 vertex_dirs[4];
getNodeVertexDirs(face_dir_corrected, vertex_dirs);
li0 = getSmoothLight(p_map_rightmost, vertex_dirs[0],
vmanip, daynight_ratio);
li1 = getSmoothLight(p_map_leftmost, vertex_dirs[1],
vmanip, daynight_ratio);
li2 = getSmoothLight(p_map_leftmost, vertex_dirs[2],
vmanip, daynight_ratio);
li3 = getSmoothLight(p_map_rightmost, vertex_dirs[3],
vmanip, daynight_ratio);
}
makeFastFace(tile, li0, li1, li2, li3,
sp, face_dir_corrected, scale,
posRelative_f, dest);
#endif
}
continuous_tiles_count = 0;
@ -890,6 +846,7 @@ scene::SMesh* makeMapBlockMesh(MeshMakeData *data)
FastFace &f = fastfaces_new[i];
const u16 indices[] = {0,1,2,2,3,0};
const u16 indices_alternate[] = {0,1,3,2,3,1};
video::ITexture *texture = f.tile.texture.atlas;
if(texture == NULL)
@ -898,8 +855,18 @@ scene::SMesh* makeMapBlockMesh(MeshMakeData *data)
material.setTexture(0, texture);
f.tile.applyMaterialOptions(material);
const u16 *indices_p = indices;
collector.append(material, f.vertices, 4, indices, 6);
/*
Revert triangles for nicer looking gradient if vertices
1 and 3 have same color or 0 and 2 have different color.
*/
if(f.vertices[0].Color != f.vertices[2].Color
|| f.vertices[1].Color == f.vertices[3].Color)
indices_p = indices_alternate;
collector.append(material, f.vertices, 4, indices_p, 6);
}
}