In the doRaycast() function.
instead of :
Code:
float minx = floorf(x1), maxx = minx + 1.0f;
float tx = ((x1 > x2) ? (x1 - minx) : (maxx - x1)) / std::abs(x2 - x1);
float miny = floorf(y1), maxy = miny + 1.0f;
float ty = ((y1 > y2) ? (y1 - miny) : (maxy - y1)) / std::abs(y2 - y1);
float minz = floorf(z1), maxz = minz + 1.0f;
float tz = ((z1 > z2) ? (z1 - minz) : (maxz - z1)) / std::abs(z2 - z1);
float deltatx = 1.0f / std::abs(x2 - x1);
float deltaty = 1.0f / std::abs(y2 - y1);
float deltatz = 1.0f / std::abs(z2 - z1);
float tx = ((x1 > x2) ? (x1 - minx) : (maxx - x1)) / std::abs(x2 - x1);
float miny = floorf(y1), maxy = miny + 1.0f;
float ty = ((y1 > y2) ? (y1 - miny) : (maxy - y1)) / std::abs(y2 - y1);
float minz = floorf(z1), maxz = minz + 1.0f;
float tz = ((z1 > z2) ? (z1 - minz) : (maxz - z1)) / std::abs(z2 - z1);
float deltatx = 1.0f / std::abs(x2 - x1);
float deltaty = 1.0f / std::abs(y2 - y1);
float deltatz = 1.0f / std::abs(z2 - z1);
rewrite to :
Code:
float deltatx = 1.0f / std::abs(x2 - x1);
float deltaty = 1.0f / std::abs(y2 - y1);
float deltatz = 1.0f / std::abs(z2 - z1);
float minx = floorf(x1), maxx = minx + 1.0f;
float tx = ((x1 > x2) ? (x1 - minx) : (maxx - x1)) * deltatx; // 1.0f / std::abs(x2 - x1)
float miny = floorf(y1), maxy = miny + 1.0f;
float ty = ((y1 > y2) ? (y1 - miny) : (maxy - y1)) * deltaty;
float minz = floorf(z1), maxz = minz + 1.0f;
float tz = ((z1 > z2) ? (z1 - minz) : (maxz - z1)) * deltatz;
float deltaty = 1.0f / std::abs(y2 - y1);
float deltatz = 1.0f / std::abs(z2 - z1);
float minx = floorf(x1), maxx = minx + 1.0f;
float tx = ((x1 > x2) ? (x1 - minx) : (maxx - x1)) * deltatx; // 1.0f / std::abs(x2 - x1)
float miny = floorf(y1), maxy = miny + 1.0f;
float ty = ((y1 > y2) ? (y1 - miny) : (maxy - y1)) * deltaty;
float minz = floorf(z1), maxz = minz + 1.0f;
float tz = ((z1 > z2) ? (z1 - minz) : (maxz - z1)) * deltatz;
Not a bug deal, just less abs call, less subtraction, and overall less divisions.
Sorry I have the "divide desease" for several months.
Make me feel like Adrian Monk...