Processing資料(5) 正弦波と極座標
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The document discusses sinusoidal waves and polar coordinates. It contains code examples that generate sinusoidal waves by plotting ellipses along the y-axis using sinusoidal functions of the theta variable. The theta variable is incremented each frame to animate the waves. It also contains an explanation of polar coordinates using the notation (谤*肠辞蝉(θ),谤*蝉颈苍(θ)) to represent a point in polar space. Finally, it shows code for circular motion by calculating x and y coordinates based on polar coordinates and animating theta to rotate around a circle.
Processing資料(5) 正弦波と極座標
- 2. 正弦波
- 3. float theta; void setup() { size(580, 350); background(255); } void draw() { background(255); for (int i = 0; i < 30; i++) { ellipse(i*20, height/2 + 100*sin(radians(theta + i * 10)), 20, 20); } theta++; }
- 4. float theta; void setup() { size(580, 350); background(255); } void draw() { background(255); for (int i = 0; i < 30; i++) { ellipse(i*20, height/2 + 100*sin(radians(theta + i * 10)), 20, 20); } theta++; }
- 5. float theta; void setup() { size(580, 350); background(255); } void draw() { background(255); for (int i = 0; i < 30; i++) { ellipse(i*20, height/2 + 50*sin(radians(theta + i * 10)), 20, 20); } theta++; }
- 7. float theta; void setup() { size(580, 350); background(255); } void draw() { background(255); for (int i = 0; i < 30; i++) { ellipse(i*20, height/2 + 100*sin(radians(theta + i * 10)), 20, 20); } theta++; }
- 8. float theta; void setup() { size(580, 350); background(255); } void draw() { background(255); for (int i = 0; i < 30; i++) { ellipse(i*20, height/2 + 100*sin(radians(theta + i * 30)), 20, 20); } theta++; }
- 10. 極座標 θ r (谤*肠辞蝉(θ),谤*蝉颈苍(θ))
- 11. 円运动
- 12. int r = 150; float x; float y; int theta; void setup() { size(400, 400); background(255); } void draw() { fill(255, 30); noStroke(); rect(0, 0, width, height); x = width/2 + r * cos(radians(theta)); y = height/2 + r * sin(radians(theta)); fill(0); ellipse(x, y, 30, 30); theta++; }