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# comradeKamoKamo/sin_function.pde

Last active Aug 21, 2019
Processing3 - 回る正弦関数
 //sin() と tan()の動き //スペースキーで止まるよ //r:Φ初期角度　a:ω角速度? float r = 0; float a = 0.01; boolean isStop = false; void setup() { size(700,700); frameRate(100); } void keyPressed() { if(keyCode==32) { if(isStop) { isStop = false; } else { isStop = true; } }else if(keyCode==UP) { a = a + 0.001; }else if(keyCode==DOWN) { a = a - 0.001; } } void draw() { if(isStop) return; fill(200,200,200); quad(0,0,700,0,700,700,0,700); fill( 255, 255, 255 ); stroke(0,0,0); ellipse(350,350,503,503); line(350,50,350,650); line(50,350,650,350); line(600,0,600,700); quad(0,655,300,655,300,700,0,700); fill(255,0,0); text("θ = " + r ,100,680); text("a = " + a ,100,690); stroke(255,0,0); float x = 250*cos(r)+350; float y = -250*sin(r)+350; line(350,350,x,y); line(x,y,x,350); stroke(0,0,255); if(cos(r)>0) { line(x,y,600,tan(r)*-250+350); }else if(cos(r)<0) { line(350,350,600,tan(r)*-250+350); } r = r + a; }
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