projection

问题 I am using Spring Repository interfaces a lot. One was working fine for me but then I realized I needed a little bit more from it. I wanted to go one more level of get() I work on an intranet so can't copy and paste but hopefully the following will give enough info to make it understandable... @Entity @Table(name="person") class Person { ... } @Entity @Table(name="requisite") class Requisite { ... @OneToOne @JoinColumn private Document document; } @Entity @Table(name="person_requisite") class

问题 I have been on this for 10 hours now and I am starting to think that it is either something really small or something fundamental I am missing here. This is a simple component that all I want is to render the us map with the d3 version 4 via geoAlbersUsa and PROJECT it in a panel so that it is SCALED. If I remove the projection all works great and I get the map. The moment in any shape or form I do the projection it simply shows a colored rectangle. Here is the code: import React from 'react'

问题 I'm using openLayers to show a whole bunch of layers of Uruguay, that come from a WMS.. I'm trying to add the option that you can use two different base layers. One of them is the google satellite layer which is in spherical mercator 900913.. Then I have a map of Uruguay which is in UTM21S 32721.. My problem seems to be when I try to change the base layer. The wms layers that I added to the map (for example routes of Uruguay) when I was showing the google satellite seem to disappear. The same

问题 I'm writing shadow mapping in deferred shading. Here is my depth map for directional light (orthogonal projection): Below is my full-screen quad shader to render pixel's depth in light view space: #version 330 in vec2 texCoord; out vec3 fragColor; uniform mat4 lightViewProjMat; // lightView * lightProj uniform sampler2D sceneTexture; uniform sampler2D shadowMapTexture; uniform sampler2D scenePosTexture; void main() { vec4 fragPos = texture(scenePosTexture, texCoord); vec4 fragPosLightSpace =

问题 In my java application i want retrieve a field of an embedded document. This is my pojo: My User.class public class User implements Comparable<User> { @Id private String username; private String ownerFirstname; private String ownerLastname; @DBRef @CascadeSave @JsonInclude(JsonInclude.Include.NON_NULL) private Role role; } Role.class @Document @JsonDeserialize(using = RoleDeserializer.class) public interface Role { String getId(); void setId(String id); } Society.class @Document(collection =

问题 Lately, I got a really weird bug that it’s even hard to describe. We have a site created with Orchard in 2 servers, the dev server and the production-live server. In the dev server everything works perfectly. In the production server, if you are logged on the CMS, again everything works well. If you are not logged on though, like the actual visitors of the site are, then it’s nearly perfect. The problem is almost random and happens only in 1-2 places in the whole site (different places).

问题 I want to show how big Brazilian Amazon Forest is, plotting different countries inside it. Like in this image: To accomplish that, I loaded some shapefiles and changed their projection to one that would keep the areas proportional, like Cylindrical Equal Area: library(rgdal) countries <- readOGR("shp","TM_WORLD_BORDERS-0.3") countries <- spTransform(countries,CRS("+proj=cea")) amzLegal <- readOGR("shp","amazlegal") amzLegal@proj4string <- CRS("+proj=longlat") amzLegal <- spTransform(amzLegal

问题 I am trying to filter an associative array so that certain values within a specific key will go into a specific variable. To make sense of this, here is an example of what I'm trying to do: Input (from DB): Array ( [0] => Array ( [id] => '12', [status] => '0' ) [1] => Array ( [id] => '13', [status] => '1' ) [2] => Array ( [id] => '14', [status] => '1' ) ) Output (in PHP): $status_one = Array ( [0] => Array ( [id] => '13', [status] => '1' ) [1] => Array ( [id] => '14', [status] => '1' ) );

问题 I know that transforming a square into a trapezoid is a linear transformation, and can be done using the projective matrix, but I'm having a little trouble figuring out how to construct the matrix. Using the projective matrix to translate, scale, rotates, and shear is straightforward. Is there a simple projective matrix which will transform a square to a trapezoid? 回答1: a,b,c,d are the four corners of your 2D square. a,b,c,d are expressed in homogeneous coordinate and so they are 3x1 matrices

问题 I'm trying to realize a virtual Pan-Tilt-Zoom (PTZ) camera, based on data from physical fisheye camera (180 degrees FOV). In my opinion I have to realize the next sequence. Get the coordinates of center of fisheye circle in coordinates of fisheye sensor matrix. Get radius of fisheye circle in the same coordinate system. Generate a sphere equation, which has the same center and radius as flat fisheye image on flat camera sensor. Project all colored points from flat image to upper hemisphere.