Wizard's Fire Shot Class

WFShot

Shot = class()

-- constants
SHOT_READY = -1
SHOT_IN_FLIGHT = 0
SHOT_DONE = 1

function Shot:init(sx, sy, tx, ty, stat)
    -- you can accept and set parameters here
    self.x = sx
    self.y = sy
    self.tx = tx
    self.ty = ty
    self.status = stat
    self.size = 1
end

function Shot:update()
    if self.status == SHOT_IN_FLIGHT then
        if self.x < self.tx then
            self.x = self.x + 4
        elseif self.x > self.tx then
            self.x = self.x - 4
        end
        if self.y < self.ty then
            self.y = self.y + 4
        elseif self.y > self.tx then
            self.y = self.y - 4
        end
        -- check if done
        if math.abs(self.x - self.tx) < 6 and 
           math.abs(self.y - self.ty) < 6 then
            self.status = SHOT_DONE
            sound(SOUND_SHOOT,222)
        end
    end
    return nil
end

function Shot:collision(x, y)
    if math.abs(self.tx - x) < self.size + 2 and
       math.abs(self.ty - y) < self.size + 2 then
        return true
    end
    return false
end

function Shot:draw()
    self:update()
    if self.status == SHOT_IN_FLIGHT then
        stroke(182, 179, 99, 255)
        ellipse(self.x, self.y, 11, 11)
        stroke(128, 130, 153, 255)
        ellipse(self.tx, self.ty, 11, 11)
        return nil
    end
    if self.status == SHOT_DONE then
        self.size = self.size + 1
        stroke(0, 0, 0, 255)
        fill(0, 0, 0, 255)
        rect(self.tx-10, self.ty-10, 20, 20)
        fill(255, 177, 0, 255)
        stroke(255, 179, 0, 255)
        ellipse(self.tx, self.ty, self.size * 3, self.size * 2)
        if self.size > 20 then
            self.x = -999
            self.status = SHOT_READY
        end
    end
end

function Shot:touched(touch)
    -- Codify does not automatically call this method
end