PImage.width()
描述
取得 PImage 物件中存放的圖片的寬度。
語法
image.width();
參數
無參數
回傳
int:圖片寬度,單位為像
範例
// 把 SD 卡中名為 "arduino.bmp" 的圖片顯示在螢幕上
#include <SPI.h>
#include <SD.h>
#include <TFT.h>
#define cs 10
#define dc 9
#define rst 8
TFT screen = TFT(cs, dc, rst);
PImage logo;
void setup() {
// 初始化 TFT 物件
screen.begin();
// 初始化 SD 卡
SD.begin();
// 設定背景色為黑色
screen.background(0, 0, 0);
// 載入圖片到 PImage 物件
logo = screen.loadImage("arduino.bmp");
if (!logo.isValid()) {
Serial.println("error while loading arduino.bmp");
}
}
void loop() {
// 隨機的挑選圖片顯示的位置
int x = random(screen.width() - logo.width());
int y = random(screen.height() - logo.height());
screen.image(logo, x, y);
delay(1500);
}
See also
- image
- loadImage( )
- PImage.isValid( )
- PImage.height( )
The text of the 86Duino reference is a modification of the Arduino reference, and is licensed under a Creative Commons Attribution-ShareAlike 3.0 License. Code samples in the reference are released into the public domain.
