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    <p>@Aleph thanks for your suggestion. I found that it was the code which determines when to assign a new motionTarget, that was faulty, not the code i posted to begin with. When you mentioned keeping track of each nodes position, i thought of my motionTarget determination code and found the error after 2-3 hours. I ended up doing it like this:</p> <pre><code>-(void) updatePositions:(ccTime) dt { for (MSWFiend *currFiend in fiendSet) { int fiendGX,fiendGY,targetGX,targetGY,dGX,dGY; float x,y,snappedX,snappedY; BOOL snappedIntoPosition = FALSE; fiendGX = (int)round(100.0f*(currFiend.position.x/20)); fiendGY = (int)round(100.0f*(currFiend.position.y/20)); targetGX = (int)round(100.0f*(currFiend.motionTarget.x/20)); targetGY = (int)round(100.0f*(currFiend.motionTarget.y/20)); snappedX = currFiend.position.x; snappedY = currFiend.position.y; dGX = abs(fiendGX-targetGX); dGY = abs(fiendGY-targetGY); float snappingThreshold; //1 = snap when 0.1 from motionTarget. snappingThreshold = currFiend.speed/10; if (dGX &lt; snappingThreshold &amp;&amp; dGY &lt; snappingThreshold) { snappingThreshold = currFiend.motionTarget.x; snappingThreshold = currFiend.motionTarget.y; int newPathStep; newPathStep = currFiend.pathStep + 1; currFiend.pathStep = newPathStep; } int gX,gY; gX = [[currFiend.path objectAtIndex:currFiend.pathStep] nodeX]; gY = (tileMap.mapSize.height-[[currFiend.path objectAtIndex:currFiend.pathStep] nodeY])-1; currFiend.motionTarget = ccp(gX*20,gY*20); //Assign motion target to the next A* node. This is later used by the position updater. if (currFiend.motionTarget.x != -1 &amp;&amp; currFiend.motionTarget.y != -1) { x = currFiend.motionTarget.x; y = currFiend.motionTarget.y; if ((int)floor(currFiend.position.x) &lt; (int)floor(currFiend.motionTarget.x)) { //Move right x = snappedX+(currFiend.speed*dt); if (x &gt; currFiend.motionTarget.x) { x = currFiend.motionTarget.x; } y = snappedY; } if ((int)floor(currFiend.position.x) &gt; (int)floor(currFiend.motionTarget.x)) { //Move left x = snappedX-(currFiend.speed*dt); if (x &lt; currFiend.motionTarget.x) { x = currFiend.motionTarget.x; } y = snappedY; } if ((int)floor(currFiend.position.y) &lt; (int)floor(currFiend.motionTarget.y)) { //Move up y = snappedY+(currFiend.speed*dt); if (y &gt; currFiend.motionTarget.y) { y = currFiend.motionTarget.y; } x = snappedX; } if ((int)floor(currFiend.position.y) &gt; (int)floor(currFiend.motionTarget.y)) { //Move down y = snappedY-(currFiend.speed*dt); if (y &lt; currFiend.motionTarget.y) { y = currFiend.motionTarget.y; } x = snappedX; } } currFiend.position = ccp(x,y); } } </code></pre>
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