I want to change position of player which is rotating when it is 90% collide with door
You can simply use distance_to()
or distance_squared_to() and get the position between object a and the area position
Related
I try to setting camera position of pptk, with this method:
xyz = pptk.rand(100, 3)
v = pptk.viewer(xyz)
v.set(lookat=[0,0,0])
this working well, the camera position change.
But when I left-clik on it, to move the point cloud, the camera position return to the original position
Do you have an idea how to maintain the camera position
Thank you
Please send the look-at coordinates as a tuple (0,0,0) instead of a list [0,0,0].
v.set(lookat=(0,0,0))
I found this bug too. I'm currently working around it by first using the mouse wheel to move in/out on the point cloud before clicking; then the look at position doesn't change.
Hello i recently started to study Phaser and i have came to a problem witch i need help with solving.
I created a 3 layer map with Tiled. SkyLayer, GroundLayer, BrickLayer. I added physics that allow the player to move around the GroundLayer. I also added physics that allow him to jump on the BrickLayer. I am struggling to make a motion that allows the player to jump from the bottom hit the brick with his head, when he hits his head the motion of the brick to move up a pixel and then back down a pixel just as in Mario. I have trouble finding out how to identify which brick section i have hit from the BrickLayer so i can later on apply the animation to the brick element.
Simple Layers itself contains only tiles, which has no any animation.
If you need something to have animation, you need to use object layer and convert its objects to sprites with TileMap.createFromObjects.
I'm new to MFC. I know how to draw a line and how to scribble in MFC. I use CDC and some functions such as LineTo() and MoveTo() to do this. Moreover, I've got FillRect() and Rectangle().Now I want to drag my rectangle or any polygon in the view.It's like you drag a icon on your desktop.
I think the first step is to get the region.Then erase the old polygon and when the mouse move draw a same polygon which depends on the point where the mouse go.
So I search region in MSDN and I got Region class and CRgn class.But before I look into these two class I want to know whether I'm in the right direction.
I need more suggestions on how to learn MFC. Actually,all I need is to finish my homework which is mainly about draw polygons and drag them and link them by line. And I hope I can finish this homework all by myself and MSDN. Can MSDN help me do that?
The CDC::Polyline function will draw a polygon much faster than using LineTo and MoveTo.
You do not need region and do not need to erase the old polygon. Instead, you need to draw everything in the view OnDraw. Any change you want to make with the mouse should change the array of coordinates that represent the polygon and then call Invalidate. In other words, do not draw in the mouse message handlers. Calling Invalidate in the mouse message handlers will cause OnDraw to be called later and it should repaint the entire view.
I am making a game in Cocos2d. I want there to be a dotted line that follows the user's finger. I want the line to be straight. The problem is, how do I check to see how many 'dots' will fit in the distance between the ball and where the user is touching? And make it follow in a STRAIGHT line between the ball's position and the finger's position? So here's a re-clarification:
The ball sits still on the left side of the screen, and is halfway up the screen. The user drags their finger, and a dotted line is drawn between the ball's position and the touch's position. I have a 'dot' image to be used, and I would like it to be used as the dots in the line. So it will have to recreate the sprite as many times as it will fit in the area between the two points. Please tell me if you want me to clarify further, Thanks!!
I would make a CCNode object called dottedLine or something.
The dot image would be a sprite that gets added as a child of the node (multiple times).
I would work out the path from ball to finger touch using Trigonometry/Pythagoras theorem.
For creating the line:
From point 0, the ball, i would add 15-20 pixels towards the touch point along the path, and place a dot, I'd repeat this until I reached the end of the line.
Every dot that was placed I would increment a counter, and set that number as the integer tag of that sprite for use in an update method.
Every time the cctouchesmoved method gets called, i'd call an update method on the dottedLine object.
This method would check the distance between the ball and touch point, divide it by the number of dots currently children of the object and remove or add any that are needed. Recreating the sprites every time you move your finger would be messy and wasteful, so reusing your dots and just setting them new positions as the path between ball and touch point changes would probably be best.
I'm not going to provide you code, i think i've explained more than enough of the working out for you to do some googling and work this out.
This question already has answers here:
How can I cut one shape inside another?
(4 answers)
Closed 6 years ago.
So basically as my title says, I want to "cut a hole" in a rect element.
I have two rect elements, one on top of the other. The one on the bottom has a fill colour of white, and the one on the top has a fill colour of grey.
What I want to do is cut a triangle out of the top rect element so that the rect element below shows through.
This svg element is going to be used as an audio button for a media player on a page. In other words, you'll be able to click (or drag) your mouse left/right and the change in audio level will be represented by a change in the width of the rect element on the bottom, which shows through the triangle cut out of the top rect element.
I hope that's not too confusing. :P
Here is a quick mockup of what it should look like: http://forboden.com/coding/s1.png
Here is my code: http://forboden.com/coding/svgClipTest.html
Where am I going wrong here?
You should be able to use the fill-rule: evenodd(default) property to achieve this effect, if you want to prevent the fill of the rectangle from painting where the circle is. See this example from the SVG specification:
The key point is draw outer shape and inner shapes(holes) in different direction (clockwise vs anti-clockwise).
Draw the outer shape clockwise and draw the inner(holes) shapes anti-clockwise.
Or conversely, draw the outer shape(holes) anti-clockwise and draw the inner shapes clockwise.
Concat the path datas of outer shape and inner shapes(holes).
You can cut more holes by concat more hole path data.
This image explain how to cut a hole:
I see that you have it solved already, just wanted to add that if you want something more advanced then it's often quite easy to use a <mask>, see http://dev.w3.org/SVG/profiles/1.1F2/test/svg/masking-path-11-b.svg for example.
However, if you can avoid masking and clipping (e.g by just drawing things on top) that usually leads to better performance/user-experience.
Easiest way is to use <path> with the hole, and set pointer-events to none so events can pass through to the <rect> under. Of course there are many other ways to handle events such as wrapping them with a <g> and handling events on it.
You don't need to limit yourself to the basic shapes and use complicated clipping. Make things felxible enough so you can copy&paste path data generated by tools like inkscape.