81 lines
2.3 KiB
JavaScript
81 lines
2.3 KiB
JavaScript
Drone.extend('sphere', function(block,radius)
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{
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var lastRadius = radius;
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var slices = [[radius,0]];
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var diameter = radius*2;
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for (var i = 0; i <= radius;i++){
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var newRadius = Math.round(Math.sqrt(radius*radius - i*i));
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if (newRadius == lastRadius)
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slices[slices.length-1][1]++;
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else
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slices.push([newRadius,1]);
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lastRadius = newRadius;
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}
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this.chkpt('sphere');
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//
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// mid section
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//
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this.up(radius - slices[0][1])
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.cylinder(block,radius,(slices[0][1]*2)-1)
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.down(radius-slices[0][1]);
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var yOffset = -1;
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for (var i = 1; i < slices.length;i++){
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yOffset += slices[i-1][1];
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var sr = slices[i][0];
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var sh = slices[i][1];
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// northern hemisphere
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this.up(radius + yOffset).fwd(radius-sr).right(radius-sr)
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.cylinder(block,sr,sh)
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.left(radius - sr).back( radius - sr). down(radius + yOffset);
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// southern hemisphere
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this.up(radius - (yOffset+sh+1)).fwd(radius-sr).right(radius-sr)
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.cylinder(block,sr,sh)
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.left(radius - sr).back( radius - sr). down(radius - (yOffset+sh+1));
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}
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return this.move('sphere');
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});
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//
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// sphere0 creates an empty sphere but the code needs work
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// - there are gaps in the sphere due to rasterization.
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//
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Drone.extend('sphere0', function(block,radius)
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{
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var lastRadius = radius;
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var slices = [[radius,0]];
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var diameter = radius*2;
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for (var i = 0; i <= radius;i++){
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var newRadius = Math.round(Math.sqrt(radius*radius - i*i));
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if (newRadius == lastRadius)
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slices[slices.length-1][1]++;
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else
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slices.push([newRadius,1]);
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lastRadius = newRadius;
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}
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this.chkpt('sphere0');
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//
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// mid section
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//
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this.up(radius - slices[0][1])
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.cylinder0(block,radius,(slices[0][1]*2)-1)
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.down(radius-slices[0][1]);
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var yOffset = -1;
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for (var i = 1; i < slices.length;i++){
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yOffset += slices[i-1][1];
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var sr = slices[i][0];
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var sh = slices[i][1];
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// northern hemisphere
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this.up(radius + yOffset).fwd(radius-sr).right(radius-sr)
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.cylinder0(block,sr,sh)
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.left(radius - sr).back( radius - sr). down(radius + yOffset);
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// southern hemisphere
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this.up(radius - (yOffset+sh+1)).fwd(radius-sr).right(radius-sr)
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.cylinder0(block,sr,sh)
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.left(radius - sr).back( radius - sr). down(radius - (yOffset+sh+1));
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}
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return this.move('sphere0');
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});
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