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Bitmap/Bresenham's line algorithm: Difference between revisions
Added code for Metal compute shader
m (→{{header|zkl}}: added image) |
(Added code for Metal compute shader) |
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Line 2,002:
myBitmap = drawLine myBitmap [0, 511] [511, 0] #((color 255 255 255))
display myBitmap</lang>
=={{header|Metal}}==
For drawing lines between points in an Apple Metal compute shader.
<lang metal>void drawLine(texture2d<float, access::write> targetTexture, uint2 start, uint2 end);
void drawLine(texture2d<float, access::write> targetTexture, uint2 start, uint2 end)
{
int x = int(start.x);
int y = int(start.y);
int dx = abs(x - int(end.x));
int dy = abs(y - int(end.y));
int sx = start.x < end.x ? 1 : -1;
int sy = start.y < end.y ? 1 : -1;
int err = (dx > dy ? dx : -dy) / 2;
while (true)
{
targetTexture.write(float4(1.0), uint2(x, y));
if (x == int(end.x) && y == int(end.y))
{
break;
}
int e2 = err;
if (e2 > -dx)
{
err -= dy;
x += sx;
}
if (e2 < dy)
{
err += dx;
y += sy;
}
}
}</lang>
=={{header|Nim}}==
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