clipping

问题 I have been reading articles about clipping now for hours now but I dont seem to find a solution for my problem. This is my scenario: Within an OpenGL ES environment (IOS,Android) I am having a 2D scene graph consisting of drawable objects, forming a tree. Each tree node has its own spatial room with it's own transformation matrix, and each node inherits its coordinate space to its children. Each node has a rectangular bounding box, but these bounding boxes are not axis aligned. This setup

问题 I need to clip a few hundred objects under a clipping plane in OpenGL ES 2.0 and would appreciate ideas from people more experienced with this subset of OpenGL. In OpenGL ES 1.x there is glClipPlane. On the desktop you have glClipPlane, or gl_ClipDistance in your shader. Neither of these two are available in OpenGL ES 2.0. It seems that this kind of functionality disappeared completely with 2.0. It seems the only way to do this is either A) run the plane equation in the fragment shader, or B)

问题 I have a UserControl which has a quadratic Image as a Child. This Image is at the bottom of the UserControl, and half of it is clipped (e.g. the Control's Height is 400, Image's height is 200 and it is set to y=300). Now, When I rotate the Image, it is still clipped like the way it was first. Like when rotating around 90 degrees, I suddenly have an Image which is only 100px wide. It seems like the original clipping which was made because of the bounds of the UserControl, are applied forever.

问题 I'm writing a simple 2D game engine using the HTML5 canvas. I've come to adding a lighting engine. Each light source has a radius value and an intensity value (0-1, eg 1 would be very bright). There's also an ambient light value that is used to light everything else in the world that isn't near a light source (0-1, eg 0.1 would be moonlight). The process of lighting is done on a separate canvas above the main canvas: For each light source, a radial gradient is drawn at that position with the

问题 First to see the below images. package com.syncfusion.rating; import android.content.Context; import android.graphics.Canvas; import android.graphics.Color; import android.graphics.Paint; import android.graphics.Path; import android.graphics.Region; import android.view.View; /** * Created by chozarajan.pandiyarajan on 10/9/2015. */ public class SfRatingItem extends View { private int fillColor,minDim,topXPoint,topYPoint; private double bigHypot,bigA,bigB,littleHypot,littleA,littleB,value;

问题 Kineticjs automatically adopts canvas size and whole graphics on Retina displays, so all looks sharp and clean without blurry pixelation. But thing goes wrong when I try to use custom clipping function. Here is some code this.layerOne = new Kinetic.Layer(); this.layerTwo = new Kinetic.Layer({ clipFunc : function(c){ var ctx = c.getContext(); ctx.rect(0,0,width,height); } }); If I add shape on layerOne it will be rendered perfectly considering 2x pixel aspect, but the same shape added on

问题 I'm using TabPanel for building my GUI. The problem is, that when I'm drawing rectangle it appears outside of my axes. Problem does not exist when not using TabPanel. I was testing 'clipping' parameter, but my object is still outside axes (fig). Any hints? thanks! 回答1: I have good news and bad news. (There is no answer all over the internet, I just saw unanswered requests like this one). I had exactly the same problem. After checking, the problem is actually restrained to MARKERS (so either

问题 My goal is moving clipping area 10 pixels at a time using arrow keys. I got the image on the panel and the clipping area is there too, but the thing is that the clipping area won't move. Here is my code, and I hope to learn what's wrong with it. import java.awt.*; import java.awt.event.*; import javax.swing.*; public class clipping_area extends JFrame{ clipping_area(){ setTitle("OpenChallenge"); setVisible(true); setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); setSize(500,500); add(new

问题 Please see the following JSFiddle: http://jsfiddle.net/zScKW/ Notice that the child div clips the border of its parent. If I remove the border (but keep the rounded corners), the item clips as we would expect. Firefox 4 renders this markup as I expect, with the item clipped before the border starts. Chrome, however, does not clip the child until the border's outer edge is reached. Who has this behavior correct, and is there a hack? I am fine with leaving it in chrome if it is a bug that will

问题 I have a photo gallery that uses images "cut off" at an odd angle but the cut-out needs to be transparent in order to see the background. I had been able to get it to work using alpha masks but there must be a better way. Rather than mask each image within the gallery, I wondered whether it might be possible instead to clip/mask the containing div using html5. I've been able to find a jsfiddle, which I've changed slightly, but it clips an image - not a div. Now I'm having a complete brain