Coursework/sim.html at master · AaronGoulding/Coursework · GitHub

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<!DOCTYPE html>
<canvas id="canvas" width="900" height="900"></canvas>

<script type="text/javascript">
    cars = new Array();
    roads = new Array();
    junctions = new Array();

    roads.push(new road(900, 5, 0, 450))
    roads.push(new road(5, 900, 580, 0))
    roads.push(new road(5, 900, 450, 0))
    roads.push(new road(5, 900, 260, 0))

    //Finds all of the junctions
    for (var h = 0; h < roads.length; h++) {
        //Takes all horizontal roads
        if (roads[h].width == 900) {
            for (var v = 0; v < roads.length; v++) {
                //Gets all Vertical roads
                if (roads[v].height == 900) {
                    junctions.push(new junction(roads[v].x + 2, roads[h].y + 2, "green", "red"));
                }
            }
        }
    }


    //Get random integer
    function getRandomInt(min, max) {
        return Math.floor(Math.random() * (max - min + 1)) + min;
    }

    //Class for cars
    function car(x, y, velX, velY, height, width) {
        this.x = x;
        this.y = y;
        this.velX = velX;
        this.velY = velY;
        this.height = height;
        this.width = width

        this.update = function () {
            for (var v = 0; v < junctions.length; v++) {
                //LOOK AT THIS BIT!!!!!!!! =================================================================================================================================================================
                if (junctions[v].area.indexOf((this.x + this.velX, this.y + this.velY)) > -1) {
                    if (junctions[v].horizontalState == "green") {
                        console.log("horizontal")
                        this.x += this.velX;
                    } else if (junctions[v].verticalState == "green") {
                        console.log("vertical")
                        this.y += this.velY;
                    }
                }
            }
            this.x += this.velX;
            this.y += this.velY;
        }
    }

        //Class for roads
        function road(width, height, x, y) {
            this.width = width;
            this.height = height;
            this.x = x;
            this.y = y;
        }

        //Class for junctions
        function junction(x, y, horizontalState, verticalState) {
            this.x = x;
            this.y = y;
            this.area = []
            for (var i = 0; i < 5; i++) {
                for (var v = 0; v < 5; v++) {
                    this.area.push([this.x + i, this.y + v])
                }
            }
            this.horizontalState = horizontalState;
            this.verticalState = verticalState;
            // sets up traffic lights 1 = left, 2 = right, 3 = up, 4 = down
            this.lights = [new light(this.x - 4, this.y - 2, this.horizontalState), new light(this.x + 3, this.y + 1, this.horizontalState), new light(this.x + 1, this.y - 4, this.verticalState), new light(this.x - 2, this.y + 3, this.verticalState)];
            this.update = function (horizontalState, verticalState) {
                this.horizontalState = horizontalState;
                this.verticalState = verticalState;
            }
        }
        function light(x, y, state) {
            this.x = x;
            this.y = y;
            this.state = state;
        }

        //Adds new cars at random intervals
        function addCar() {
            road = getRandomInt(0, roads.length - 1);
            direction = getRandomInt(0, 1);
            if (roads[road].width == 900) {
                if (direction == 1) {
                    //car going right
                    cars.push(new car(1, roads[road].y, 1, 0, 2, 4));
                } else {
                    //car going left
                    cars.push(new car(899, roads[road].y + 3, -1, 0, 2, 4));
                }
            } else {
                if (direction == 1) {
                    //car going up
                    cars.push(new car(roads[road].x, 899, 0, -1, 4, 2));
                } else {
                    //car going down
                    cars.push(new car(roads[road].x + 3, 1, 0, 1, 4, 2));
                }
            }
        }

        window.onload = function () {
            c = document.getElementById('canvas');
            cc = c.getContext('2d');
            setInterval(render, 1000 / 30);
            setInterval(addCar, getRandomInt(500, 2000));
        }

        function render() {
            cc.fillStyle = 'black';
            cc.fillRect(0, 0, c.width, c.height);
            //Roads
            for (var i = 0; i < roads.length; i++) {
                cc.fillStyle = '#282828';
                cc.fillRect(roads[i].x, roads[i].y, roads[i].width, roads[i].height);
            }
            //Cars
            for (var i = 0; i < cars.length; i++) {
                cc.fillStyle = 'white';
                cars[i].update();
                cc.fillRect(cars[i].x, cars[i].y, cars[i].width, cars[i].height);
            }
            //lights
            for (var i = 0; i < junctions.length; i++) {
                for (var p = 0; p < 4; p++) {
                    cc.fillStyle = junctions[i].lights[p].state;
                    cc.fillRect(junctions[i].lights[p].x, junctions[i].lights[p].y, 2, 2);
                }
            }
        }
</script>