point

问题 What is the meaning of a junction point in image skeleton ? I am using opencv and c++ to develop a code source to detect the main local junction point in the image .Many thanks in advace . 回答1: A junction point is usually the intersection of two lines. See this image: https://docs.google.com/file/d/0ByS6Z5WRz-h2U3NBWWZ6V3FqeUk/edit?pli=1 Skeleton refers (usually) to the skeletonization of an image. this article is useful: http://en.wikipedia.org/wiki/Topological_skeleton. So I think what they

问题 How would I go about changing points that are 'near' linear (within a threshold), actually linear? I have some code that checks if 3 points are linear to one another (give or take), and I want to replace those coordinates with new ones that are 100% inline. double distance = (x1 - x2) * (y1 - y3) - (y1 - y2) * (x1 - x3); double threshold = 4; if (Math.abs(distance) <= threshold) { // is Near line return true; } else return false; This is an EXTENSION of another post of mine... This is NOT a

问题 I want to draw a point, to simulate the position of which the light originates, however the issue I am facing now is that it is always the same size, regardless of the distance: I push literally one vertex to the GPU, my code: point.vs.glsl #version 440 core layout(location = 0) in vec4 position; layout(location = 0) uniform mat4 model_matrix; layout(location = 1) uniform mat4 view_matrix; layout(location = 2) uniform mat4 proj_matrix; void main(void) { gl_PointSize = 100.0; gl_Position =

问题 I'm using this method to simulate the outline of a point. GLfloat points[graph->vertexCount * 6]; GLfloat outlinePoints[graph->vertexCount * 6]; for (int i = 0 ; i < graph->vertexCount; i++) { outlinePoints[i*6] = (graph->vertices[i].x / (backingWidth/2) ) - 1; outlinePoints[i*6+1] = -(graph->vertices[i].y / (backingHeight/2) ) + 1; outlinePoints[i*6+2] = 0.9; outlinePoints[i*6+3] = 0.9; outlinePoints[i*6+4] = 0.9; outlinePoints[i*6+5] = 1.0; points[i*6] = (graph->vertices[i].x /

问题 I need to define a 2D plane area in front of a Point(which is our player position) and check which Points(enemies) are within it. In the game it is used to determine what enemies are within the "box" in front of us with X width, Y height and Z length. I need help calculating the bottom left and top right points of the plane. Input : We know the player position and we know the player rotation. Only the player Y rotation matters, as the plane should always be in front of the player. We know the

问题 Suppose you have quaternion that describes the rotation of a 3D Model. What I want to do is, given an Object (with rotationQuaternion, side vector...), I want to align it to a target point. For a spaceship, I want the cockpit to point to a target. Here is some code I have ... It's not doing what I want and I don't know why... if (_target._ray.Position != _obj._ray.Position) { Vector3 vec = Vector3.Normalize(_target._ray.Position - _obj._ray.Position); float angle = (float)Math.Acos(Vector3

问题 Im studying for an upcoming exam and am working at sample problems, in particular the following one: Add to class Point below an instance method called midpoint which returns an object of type Point representing the midpoint of two points, where one of the points is supplied as a parameter and the other is the current point (i.e. the point provided by the local instance variables). Note that midpoint returns a new Point object. Making good use of class Point, write a program which reads two

问题 "How to find a third point given both (2 points on a line) and (distance from third point to first point)?" Language: Visual Basic (2012) The third point is on the same line as the second, and may be either closer to the first point or it may be closer to the second. This is a function that will handle both (from arrays of data). Strangely I cannot seem to grasp the distance part of this question. Over reading many other questions on finding points from other points, I am unable to find

问题 using jqPlot, is it possible to limit the point labels to just one series? See screenshot below! What I would like displayed is just the values above the "Actual" bar. The "mean" and "Planned" should'nt display! Thanks! Here's my code <script type="text/javascript"> $(document).ready(function () { $.jqplot.config.enablePlugins = true; var trendline = [60000, 70000, 110000, 80000]; var planned = [70000, 90000, 120000, 100000,]; var actual = [80000, 80000, 150000, 120000]; var xAxis = ['Jan',

问题 Sorry, this is a long piece of sample code below, but here's the issue: I have a background that I'm actively drawing (I could probably be smart and draw it once and just scale it, but this shows the problem just as well). You can use the mouse wheel to zoom in and out on the image. The idea is to do a "google map" zoom where it zooms under the mouse pointer. What I've noticed is that it doesn't seem to actuall behave until the image is big enough to use both scroll bars. Until then, you get