3d

Best approach for game animation?

由 只谈情不闲聊 提交于 2020-01-09 19:28:50
问题 I have a course exercise in OpenGL to write a game with simple animation of a few objects While discussing with my partner our design options we've realized we have two major choices for how the animation is going to work, Either Set a timer for a constant interval, say 30 msec, when the timer hits, calculate where objects should be and draw the frame. or - Don't use a timer, just a normal loop that runs all the time and in each iteration check how much time passed, calculate where the

R: How to : 3d Density plot with gplot and geom_density

由 别说谁变了你拦得住时间么 提交于 2020-01-09 19:08:48
问题 I'm trying to combine multiple density plots with overlay. ggplot and geom_density do the job, but the densities are stacked on top of each other. ggplot(all.complete, aes(x=humid_temp)) + geom_density(aes(group=height, colour=height, fill=height.f, alpha=0.1)) + guides(fill = guide_legend(override.aes = list(colour = NULL))) + labs(main="Temperature by Height", x="Temperature", y="Density") Something similar to this is what I'm trying to achieve: In my case, the years would be substituted by

How to make 3D histogram in R

由 只愿长相守 提交于 2020-01-09 19:04:43
问题 This is my goal: Plot the frequency of y according to x in the z axis. These are my problems: I have a two columns array ( x and y ) and need to divide x into classes (p.ex. 0.2 ou 0.5) and calculate the frequency of y for each class of x . The plot should appear like a x-y plot in the "ground" plan and the frequency in the z axis. It could be like a surface or a 3D histogram. I tried to make it using the hist3D function of plot3D package but I don't know what I am doing wrong. This is an

3d to 2d Projection Matrix

由 天大地大妈咪最大 提交于 2020-01-09 13:58:47
问题 I have 3 points in a 3D space of which I know the exact locations. Suppose they are: (x0,y0,z0) , (x1,y1,z1) and (x2,y2,z2) . Also I have a camera that is looking at these 3 points and I know the 2D locations of those three points on camera view plane. So for example (x0,y0,z0) will be (x0',y0') , and (x1,y1,z1) will be (x1',y1') and (x2,y2,z2) will be (x2',y2') from the camera's point of view. What is the easiest way to find the projection matrix that will project those 3D points into 2D

3d to 2d Projection Matrix

由 五迷三道 提交于 2020-01-09 13:58:44
问题 I have 3 points in a 3D space of which I know the exact locations. Suppose they are: (x0,y0,z0) , (x1,y1,z1) and (x2,y2,z2) . Also I have a camera that is looking at these 3 points and I know the 2D locations of those three points on camera view plane. So for example (x0,y0,z0) will be (x0',y0') , and (x1,y1,z1) will be (x1',y1') and (x2,y2,z2) will be (x2',y2') from the camera's point of view. What is the easiest way to find the projection matrix that will project those 3D points into 2D

3d to 2d Projection Matrix

由 二次信任 提交于 2020-01-09 13:58:32
问题 I have 3 points in a 3D space of which I know the exact locations. Suppose they are: (x0,y0,z0) , (x1,y1,z1) and (x2,y2,z2) . Also I have a camera that is looking at these 3 points and I know the 2D locations of those three points on camera view plane. So for example (x0,y0,z0) will be (x0',y0') , and (x1,y1,z1) will be (x1',y1') and (x2,y2,z2) will be (x2',y2') from the camera's point of view. What is the easiest way to find the projection matrix that will project those 3D points into 2D

Mapping coordinates from plane given by normal vector to XY plane

由 ╄→尐↘猪︶ㄣ 提交于 2020-01-09 09:54:11
问题 So, I have this algorithm to calculate cross-section of 3D shape with plane given with normal vector. However, my current problem is, that the cross-section is set of 3D points (all lying on that given plane) and to display it I need to map this coordinates to XY plane. This works perfect if the plane normal is something like (0,0,c) - I just copy x and y coordinates discarding z. And here is my question: Since I have no idea how to convert any other plain could anybody give me any hint as to

interpolate 3D volume with numpy and or scipy

由 爷，独闯天下 提交于 2020-01-09 09:01:47
问题 I am extremely frustrated because after several hours I can't seem to be able to do a seemingly easy 3D interpolation in python. In Matlab all I had to do was Vi = interp3(x,y,z,V,xi,yi,zi) What is the exact equivalent of this using scipy's ndimage.map_coordinate or other numpy methods? Thanks 回答1: In scipy 0.14 or later, there is a new function scipy.interpolate.RegularGridInterpolator which closely resembles interp3 . The MATLAB command Vi = interp3(x,y,z,V,xi,yi,zi) would translate to

Android 水平3d菜单

由 大城市里の小女人 提交于 2020-01-09 04:16:07
2020年了，大家新年快乐！祝大家在新的一年中工资高涨，技术更上一层楼，职位更nb！O(∩_∩)O~。 前段时间学习时学习了android的水平3d菜单，今天把代码贴上去，供需要的小伙伴使用，废话不多说直接上！ 一、Activity package com.mm.study.study10_17; import android.graphics.Canvas; import android.graphics.Color; import android.graphics.Paint; import android.os.Vibrator; import android.support.v7.app.AppCompatActivity; import android.os.Bundle; import android.util.Log; import android.view.MotionEvent; import android.view.View; import android.view.WindowManager; import android.widget.AdapterView; import android.widget.Toast; import com.mm.study.R; /** * Android开发3D界面特效 */ public class

WebGL实现HTML5的3D贪吃蛇游戏

由 只谈情不闲聊 提交于 2020-01-07 17:33:52
【推荐】2019 Java 开发者跳槽指南.pdf(吐血整理) >>> js1k.com 收集了小于1k的javascript小例子，里面有很多很炫很酷的游戏和特效， 今年规则 又增加了新花样，传统的classic类型基础上又增加了WebGL类型，以及允许增加到2K的++类型，多次想尝试提交个小游戏但总无法写出让自己满意还能控制在这么小的字节范围。 自己写不出来，站在巨人肩膀总是有机会吧，想起 《基于HTML5的电信网管3D机房监控应用》 这篇提到的 threejs ， babylonjs 和 Hightopo 的几种基于WebGL的3D引擎，突然想挑战下自己实现个100行JS的3D小游戏，折腾了一番最终采用 Hightopo 搞了个3D贪吃蛇游戏，算了算JS代码还只有90来行，终于满足了自己的小小心愿写完这篇可以满意去睡觉了。 http://www.hightopo.com/demo/snake_20151106/GreedySnake.html http://www.hightopo.com/demo/snake_20151106/GreedySnake.html 以下先上一段最终3D游戏在平板上的运行交互 视频效果 ： http://v.youku.com/v_show/id_XNjgxMzIxOTcy.html 传统2D的贪吃蛇游戏一般通过方向键盘控制蛇的前进方向
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