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Copy pathMex_ZBuffer.m
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Mex_ZBuffer.m
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function [img, tri_ind] = Mex_ZBuffer(projectedVertex, tri, texture, img_src)
[height, width, nChannels] = size(img_src);
nver = size(projectedVertex,2);
ntri = size(tri,2);
[img, tri_ind] = Mex_ZBufferC(double(projectedVertex), double(tri), double(texture), img_src, nver, ntri, width, height, nChannels);
end
%% Matlab Ver.
% function [img] = ZBuffer(s2d, vertex, tri, texture, img_src)
% [height, width, nChannels] = size(img_src);
% img = img_src;
% s2d(2,:) = height - s2d(2,:) + 1;
% % for every triangles, find the point it covers
% imgr = zeros(height, width , 1);
% n = size(tri, 2);
%
%
% point1 = s2d(:, tri(1, :)); % A point
% point2 = s2d(:, tri(2, :)); % B point
% point3 = s2d(:, tri(3, :)); % C point
%
% cent3d = (vertex(:, tri(1, :)) + vertex(:, tri(2, :)) + vertex(:, tri(3, :))) / 3;
% r = cent3d(1,:).^2 + cent3d(2,:).^2 + cent3d(3,:).^2;
%
% tritex = (texture(:, tri(1, :)) + texture(:, tri(2, :)) + texture(:, tri(3, :))) / 3;
%
% for i = 1:n
% i
% pt1 = point1(:,i);
% pt2 = point2(:,i);
% pt3 = point3(:,i);
%
% umin = ceil(min([pt1(1); pt2(1); pt3(1)]));
% umax = floor(max([pt1(1), pt2(1), pt3(1)]));
%
% vmin = ceil(min([pt1(2), pt2(2), pt3(2)]));
% vmax = floor(max([pt1(2), pt2(2), pt3(2)]));
%
% if(umax < umin || vmax < vmin || umax > width || umin < 1 || vmax > height || vmin < 1)
% continue;
% end
%
%
% for u = umin : umax
% for v = vmin : vmax
% if( imgr(v,u) < r(i) && triCpoint([u;v], pt1, pt2, pt3))
% imgr(v,u) = r(i);
% img(v,u,:) = tritex(:,i);
% end
% end
% end
% end
%
% imshow(img/255);
%
% end
%
% % judge if this triangle cover the point
% function [state] = triCpoint(point, pt1, pt2, pt3)
%
% state = 1;
%
% v0 = pt3 - pt1; %C - A
% v1 = pt2 - pt1; %B - A
% v2 = point - pt1;
%
% dot00 = v0' * v0;
% dot01 = v0' * v1;
% dot02 = v0' * v2;
% dot11 = v1' * v1;
% dot12 = v1' * v2;
%
% inverDeno = 1 / (dot00 * dot11 - dot01 * dot01);
%
% u = (dot11 * dot02 - dot01 * dot12) * inverDeno;
%
% if(u < 0 || u > 1)
% state = 0;
% return;
% end
%
% v = (dot00 * dot12 - dot01 * dot02) * inverDeno;
% if(v < 0 || v > 1)
% state = 0;
% return;
% end
%
% state = u + v <= 1;
%
% end
%
% function [img] = Z_Buffer(s2d, vertex, tri, texture, img_src)
% aaa = 1;
% [height, width, nChannels] = size(img_src);
% img = img_src;
% s2d(2,:) = height - s2d(2,:) + 1;
% % for every triangles, find the point it covers
% imgr = zeros(height, width , 1);
% n = size(tri, 2);
%
%
% point1 = s2d(:, tri(1, :)); % A point
% point2 = s2d(:, tri(2, :)); % B point
% point3 = s2d(:, tri(3, :)); % C point
%
% cent3d = (vertex(:, tri(1, :)) + vertex(:, tri(2, :)) + vertex(:, tri(3, :))) / 3;
% r = cent3d(1,:).^2 + cent3d(2,:).^2 + cent3d(3,:).^2;
%
% tritex = (texture(:, tri(1, :)) + texture(:, tri(2, :)) + texture(:, tri(3, :))) / 3;
%
% for i = 1:n
% i
% pt1 = point1(:,i);
% pt2 = point2(:,i);
% pt3 = point3(:,i);
%
% umin = ceil(min([pt1(1); pt2(1); pt3(1)]));
% umax = floor(max([pt1(1), pt2(1), pt3(1)]));
%
% vmin = ceil(min([pt1(2), pt2(2), pt3(2)]));
% vmax = floor(max([pt1(2), pt2(2), pt3(2)]));
%
% if(umax < umin || vmax < vmin || umax > width || umin < 1 || vmax > height || vmin < 1)
% continue;
% end
%
%
% for u = umin : umax
% for v = vmin : vmax
% if( imgr(v,u) < r(i) && triCpoint([u;v], pt1, pt2, pt3))
% imgr(v,u) = r(i);
% img(v,u,:) = tritex(:,i);
% end
% end
% end
% end
%
% imshow(img/255);
%
% end
%
% % judge if this triangle cover the point
% function [state] = triCpoint(point, pt1, pt2, pt3)
%
% state = 1;
%
% v0 = pt3 - pt1; %C - A
% v1 = pt2 - pt1; %B - A
% v2 = point - pt1;
%
% dot00 = v0' * v0;
% dot01 = v0' * v1;
% dot02 = v0' * v2;
% dot11 = v1' * v1;
% dot12 = v1' * v2;
%
% inverDeno = 1 / (dot00 * dot11 - dot01 * dot01);
%
% u = (dot11 * dot02 - dot01 * dot12) * inverDeno;
%
% if(u < 0 || u > 1)
% state = 0;
% return;
% end
%
% v = (dot00 * dot12 - dot01 * dot02) * inverDeno;
% if(v < 0 || v > 1)
% state = 0;
% return;
% end
%
% state = u + v <= 1;
%
% end
%
%