任意に画像を回転させる方法をお教えください。

processing
1
2PImage img;
3PrintWriter output;
4String filename = nf(year(),4) + nf(month(),2) + nf(day(),2) + nf(hour(),2) + nf(minute(),2) ;
5
6int ratio = 1; //サイズ比率
7int angle;
8int direction;
9int baseTime;
10int response;
11int RT;
12
13int i = 0;
14
15boolean isDebug;
16int numTrial;
17
18int state;
19int currentTrial; //実験が現在何試行目を実行中かを保持
20PFont font;
21
22void setup(){
23background(128); //灰色);
24size( 600, 600 );
25frameRate(30);
26noStroke();
27
28state = 0;
29baseTime = millis();
30response = 0;
31RT = 0;
32
33textFont( createFont( "Georgia", 28 ) );
34output = createWriter( filename + ".txt" );
35
36}
37
38void draw(){
39//for(int i=0; i < 3; i++){
40if( state == 0 ){
41titlePhase();
42}
43else if( state == 1 ){
44waitPhase();
45}
46else if(state == 2){
47responsePhase();{
48baseTime = millis(); // 削除するとインターバル時間を取れなくなる
49}
50}
51else if(state == 3){
52endPhase();
53}
54}
55
56
57void titlePhase(){
58//background(0,0,255); //青
59background(255,255,255); //白
60fill(255,0,0);
61textSize(36);
62text("START", 250, 225); // 表示するテキスト, x座標, y座標
63
64int elapsedTime = millis() - baseTime;
65if( elapsedTime > 3000 ){
66state = 1;
67}
68
69}
70
71void waitPhase(){
72//background(255,128,128); //ピンク
73background(255,255,255); //白
74// check elapsed time to transit state
75int time1 = millis() - baseTime;
76if( time1 > 3000 ){
77transitState();
78}
79}
80
81void responsePhase(){
82
83background(255,255,0); //黄色
84noLoop();
85img = loadImage("image1.png");
86imageMode(CENTER);
87
88int direction = (int)random(4);
89if (direction == 0) {
90angle = 0;
91} else if (direction == 1) {
92angle = 90;
93} else if (direction == 2) {
94angle = 180;
95} else if (direction == 3){
96angle = 270;
97}
98ratio = (int)random(1,5);//サイズ 1倍から5倍までのランダム
99
100pushMatrix();
101translate(width/2, height/2);
102rotate(radians(angle));
103scale(ratio);
104image(img, 0, 0);
105popMatrix();
106
107}
108
109
110void endPhase(){
111//background(0,0,255); //青
112background(255,255,255); //白
113fill(255,0,0);
114textSize(36);
115text("FINISH", 250, 225); // 表示するテキスト, x座標, y座標
116}
117
118void transitState(){
119if( state == 1 ){
120redraw();
121state = 2;
122}
123else {
124if( currentTrial == numTrial - 1 ){
125state = 2;
126}
127else {
128currentTrial++;
129state = 1;
130}
131}
132}
133
134void keyPressed(){
135
136if (key == ENTER || key == RETURN){
137if( state == 0 ){
138state = 1;
139}
140} 
141  
142if( key == 'q' ){
143output.flush();
144output.close();
145exit();
146}
147
148if (keyPressed == true){
149
150if(i < 3){
151if( state == 2 ){
152loop();
153state = 1;
154i = i+1;
155}
156if (i >= 3){
157  state = 3;
158  //endPhase();
159}
160}
161}
162
163switch(keyCode) {
164
165case UP:
166if (angle == 0) {
167
168println ("↑ hit" +" "+ (millis() - baseTime));
169output.println("↑ hit" +" "+ (millis() - baseTime));
170}
171
172else {
173println ("↑ miss" +" "+ (millis() - baseTime));
174output.println("↑ miss" +" "+ (millis() - baseTime));
175}
176break;
177
178case RIGHT:
179if (angle == 90) {
180println ("→ hit" +" "+ (millis() - baseTime));
181output.println("→ hit" +" "+ (millis() - baseTime));
182}
183else {
184println ("→ miss" +" "+ (millis() - baseTime));
185output.println("→ miss" +" "+ (millis() - baseTime));
186}
187break;
188
189case DOWN:
190if (angle == 180) {
191println ("↓ hit" +" "+ (millis() - baseTime));
192output.println("↓ hit" +" "+ (millis() - baseTime));
193}
194else {
195println ("↓ miss" +" "+ (millis() - baseTime));
196output.println("↓ miss" +" "+ (millis() - baseTime));
197}
198break;
199
200case LEFT:
201if (angle == 270) {
202println ("← hit" +" "+ (millis() - baseTime));
203output.println("← hit" +" "+ (millis() - baseTime));
204}
205else {
206println ("← miss" +" "+ (millis() - baseTime));
207output.println("← miss" +" "+ (millis() - baseTime));
208}
209break;
210}
211}
212
213
214void mousePressed(){ //マウスクリックでスタート
215if (mousePressed == true){
216if( state == 0 ){
217state = 1;
218}
219}
220}