vertex()顶点

Name

vertex()顶点

Examples

beginShape(POINTS);

vertex(30, 20);

vertex(85, 20);

vertex(85, 75);

vertex(30, 75);

endShape();

// Drawing vertices in 3D requires P3D

// as a parameter to size()

size(100, 100, P3D);

beginShape(POINTS);

vertex(30, 20, -50);

vertex(85, 20, -50);

vertex(85, 75, -50);

vertex(30, 75, -50);

endShape();

size(100, 100, P3D);

PImage img = loadImage(“laDefense.jpg”);

noStroke();

beginShape();

texture(img);

// “laDefense.jpg” is 100×100 pixels in size so

// the values 0 and 100 are used for the

// parameters “u” and “v” to map it directly

// to the vertex points

vertex(10, 20, 0, 0);

vertex(80, 5, 100, 0);

vertex(95, 90, 100, 100);

vertex(40, 95, 0, 100);

endShape();

Description

All shapes are constructed by connecting a series of vertices. vertex() is used to specify the vertex coordinates for points, lines, triangles, quads, and polygons. It is used exclusively within the beginShape() and endShape() functions. 

Drawing a vertex in 3D using the z parameter requires the P3D parameter in combination with size, as shown in the above example. 

This function is also used to map a texture onto geometry. The texture() function declares the texture to apply to the geometry and the u and v coordinates set define the mapping of this texture to the form. By default, the coordinates used for u and v are specified in relation to the image’s size in pixels, but this relation can be changed with textureMode().

所有形状都是通过连接一系列顶点来构造的。顶点 () 用于指定点、线、三角形、四边形和多边形的顶点坐标。它只在 beginShape () 和 endShape () 函数中使用。

使用 z 参数在3D 中绘制顶点需要 P3D 参数与大小相结合, 如上例所示。

此函数还用于将纹理映射到几何图形上。纹理 () 函数声明要应用于几何图形的纹理, 而您和 v 坐标集定义了此纹理到窗体的映射。默认情况下, 用于您和 v 的坐标是相对于图像的大小 (以像素为单位) 指定的, 但可以使用 textureMode () 更改此关系。

Syntax

vertex(x, y)

vertex(x, y, z)

vertex(v)

vertex(x, y, u, v)

vertex(x, y, z, u, v)

Parameters

Returns

void

Related

beginShape()
endShape()
bezierVertex()
quadraticVertex()
curveVertex()
texture()