Parallel fill is broken

[walterbender]

Four turtles drawing filled shapes at once interfere with each other. Individually they draw properly. There must be some common state in the fill code that should be local to each turtle.

[[0,["start",{"collapsed":false,"xcor":99.99999999999986,"ycor":-173.20508075688772,"heading":210,"color":100,"shade":50,"pensize":1,"grey":100}],79,85,[null,16,null]],[1,["forward",{}],914.5,273,[3,2,34]],[2,["number",{"value":200}],993.01708984375,273,[1]],[3,["right",{}],914.5,241.5,[31,4,1]],[4,["number",{"value":90}],988,241.5,[3]],[5,["right",{}],941.5,367.5,[9,6,7]],[6,["number",{"value":120}],1015,367.5,[5]],[7,["forward",{}],941.5,399,[5,8,null]],[8,["number",{"value":200}],1020.01708984375,399,[7]],[9,["repeat",{}],928,336,[34,10,5,null]],[10,["number",{"value":3}],1000,336,[9]],[11,["setxy",{}],235.5,161,[37,12,13,20]],[12,["number",{"value":0}],309,161,[11]],[13,["number",{"value":200}],309,192.5,[11]],[14,["action",{"collapsed":false}],901,75,[null,15,33,null]],[15,["text",{"value":"Triangle"}],995.5,84,[14]],[16,["nameddo",{"value":"Triangle"}],92.5,125.5,[0,null]],[17,["start",{"collapsed":false,"xcor":99.99999999999986,"ycor":-73.20508075688772,"heading":210,"color":100,"shade":50,"pensize":1,"grey":100}],98,334,[null,39,null]],[18,["start",{"collapsed":false,"xcor":99.99999999999986,"ycor":-273.2050807568877,"heading":210,"color":100,"shade":50,"pensize":1,"grey":100}],316,318,[null,38,null]],[19,["start",{"collapsed":false,"xcor":99.99999999999986,"ycor":26.794919243112247,"heading":210,"color":100,"shade":50,"pensize":1,"grey":100}],222,89,[null,37,null]],[20,["nameddo",{"value":"Triangle"}],235.5,224,[11,null]],[21,["nameddo",{"value":"Triangle"}],111.5,469,[26,null]],[22,["nameddo",{"value":"Triangle"}],329.5,453,[23,null]],[23,["setxy",{}],329.5,390,[38,24,25,22]],[24,["number",{"value":0}],403,390,[23]],[25,["number",{"value":-100}],403,421.5,[23]],[26,["setxy",{}],111.5,406,[39,27,28,21]],[27,["number",{"value":0}],185,406,[26]],[28,["number",{"value":100}],185,437.5,[26]],[29,["setcolor",{}],914.5,178.5,[44,30,31]],[30,["number",{"value":100}],999.689453125,178.5,[29]],[31,["settranslucency",{}],914.5,210,[29,32,3]],[32,["number",{"value":75}],1051.3837890625,210,[31]],[33,["hidden",{}],914.5,115.5,[14,36]],[34,["fill",{}],914.5,304.5,[1,9,35]],[35,["hidden",{}],914.5,493.5,[34,40]],[36,["pendown",{}],914.5,115.5,[33,44]],[37,["penup",{}],235.5,129.5,[19,11]],[38,["penup",{}],329.5,358.5,[18,23]],[39,["penup",{}],111.5,374.5,[17,26]],[40,["right",{}],914.5,493.5,[35,41,42]],[41,["number",{"value":120}],988,493.5,[40]],[42,["forward",{}],914.5,525,[40,43,null]],[43,["number",{"value":200}],993.01708984375,525,[42]],[44,["setpensize",{}],914.5,147,[36,45,29]],[45,["number",{"value":1}],1023.04638671875,147,[44]],[46,2,[0,"penup"]],[47,2,[0,"setxy",0,200]],[48,2,[0,"pendown"]],[49,2,[0,"setpensize",1]],[50,2,[0,"setcolor",100]],[51,2,[0,"settranslucency",75]],[52,2,[0,"right",90]],[53,2,[0,"forward",200]],[54,2,[0,"fill"]],[55,2,[0,"right",120]],[56,2,[0,"forward",200]],[57,2,[0,"right",120]],[58,2,[0,"forward",200]],[59,2,[0,"right",120]],[60,2,[0,"forward",200]],[61,2,[0,"fill"]],[62,2,[0,"right",120]],[63,2,[0,"forward",200]]]

[sanatankc]

I am not able to reproduce the bug.

Can you mention steps to reproduce the bug?

[walterbender]

Did you try running the code attached? /me tries again now.

parallel is messed up (hitting run button). sequential (clicking one start at a time works)

[walterbender]

Looking at the code, since the graphics context is shared, they collide. I suspect some locking mechanism may help but may also degrade performance.

[sanatankc]

making sperate context might also help.