Concept
ACROSS means moving from one side of something to the other side, typically crossing over or through a barrier, space, or boundary.
Translation Strategy
To create "across" relationships on screen:
- Start and End Points: Define clear starting and ending positions on opposite sides
- Barrier Crossing: Show movement that crosses over or through an obstacle
- Perpendicular Movement: Movement often goes perpendicular to the barrier being crossed
Key P5.js Methods
Linear Movement:
•
lerp(start, stop, amount) - Smooth interpolation between start and end points
• Calculate progress:
progress += speed where speed is small increment
Path Planning:
• Define waypoints for complex crossing paths
• Use arrays to store multiple crossing points
Drawing Elements:
•
ellipse(x, y, width, height) - Draw moving objects
•
rect(x, y, width, height) - Draw barriers to cross
•
line(x1, y1, x2, y2) - Draw crossing paths
State Management:
• Track crossing progress and completion
• Use boolean flags for different crossing states
Mouse Interaction:
•
mousePressed() - Start or reset crossing animation
• Button-based controls for animation
Code Structure
Basic Pattern for "Across":
1. Define crossing path: Set start and end points
let startPoint = {x: 50, y: 150};
let endPoint = {x: 350, y: 150};
let barrier = {x: 180, y: 50, width: 40, height: 200};
2. Track progress: Use interpolation for smooth movement
let progress = 0; // 0 to 1
let currentX = lerp(startPoint.x, endPoint.x, progress);
let currentY = lerp(startPoint.y, endPoint.y, progress);
3. Update animation: Increment progress each frame
if (isMoving && progress < 1) {
progress += 0.02; // Speed of crossing
}
4. Detect crossing completion: Check when movement is done
if (progress >= 1) { isMoving = false; hasCrossed = true; }