penguin-jump-p5js/character.js

var c = {
    velocity: {
        x: 0,
        y: 0,
    },
    pos: {
        x: 0,
        y: 0,
    },
    size: 50,
    img: null,
    jump() {
        const feet = this.pos.y + this.size;

        const onPlatform = getPlatforms().some(p => {
            const overlapsX =
                this.pos.x + this.size > p.position.x &&
                this.pos.x < p.position.x + p.size.x;

            const touchesTop =
                Math.abs(feet - p.position.y) < 2;

            return overlapsX && touchesTop;
        });

        if (onPlatform) {
            this.velocity.y = -5;
        }
    },
    step() {
        // Apply Gravity on our velocity.
        this.velocity.y = this.velocity.y + 0.15;

        // Check for collision with platform ONLY WHEN FALLING.
        if ( this.velocity.y > 0 ) {
            let newY = false;
            let charXLeft  = this.pos.x;
            let charXRight = this.pos.x + this.size;
    
            let charYTop = this.pos.y
            let charYBottom = this.pos.y + this.size
    
            for ( let p of getPlatforms() ) {
                // Is the X coord colliding?
                let isXColliding = false;
    
                let pLeft  = p.position.x;
                let pRight = p.position.x + p.size.x;
                let pTop   = p.position.y;
                let pBot   = p.position.y + p.size.y;
    
                // Check Left/Right collision
                if ( charXLeft < pRight && charXLeft > pLeft ) {
                    isXColliding = true;
                } else if ( charXRight < pRight && charXRight > pLeft ) {
                    isXColliding = true;
                }
    
                if ( isXColliding ) {
                    // Check if touching platform
                    if ( charYBottom < pBot && charYBottom > pTop ) {
                        newY = pTop - this.size;
                        break;
                    }
                }
            }
    
            if ( newY != false ) {
                this.velocity.y = 0;
                this.pos.y = newY;
            }
        }

        // Applying the velocity to our character position
        this.pos.x = this.pos.x + this.velocity.x;
        this.pos.y = this.pos.y + this.velocity.y;

        this.pos.x = mouseX;
    },
    draw() {
        fill(255, 125, 125);
        if ( this.img != null ) {
            image(this.img, c.pos.x, c.pos.y, this.size*1.25, this.size*1.25);
        }
        // square(c.pos.x, c.pos.y, c.size)
    }
}