This repository was archived by the owner on Jan 4, 2023. It is now read-only.
api calculate distance
A fast way to calculate the distance between two points.
CalculateDistance ( x0, y0, x1, y1 )| Name | Value | Description |
|---|---|---|
| x0 | int | The first point’s x position. |
| y0 | int | The first point’s y position. |
| x1 | int | The second point’s x position. |
| y1 | int | The second point’s y position. |
| Value | Description |
|---|---|
| int | Returns an integer for the distance between the two points. |
In this example, we will calculate the distance between 2 points and use a canvas to visualize it. Running this code will output the following:
local pointA = NewPoint(8, 32)
local pointB = NewPoint(248, 232)
local canvas = NewCanvas(256, 240)
local distance = 0
local display = Display()
function Init()
-- Set the canvas stroke to a white 1x1 pixel brush
canvas:SetStroke(14, 1)
end
function Update(timeDelta)
-- Update position B with the MousePosition
pointB = MousePosition()
if(pointB.X > 0 and pointB.Y < display.X and pointB.Y > 0 and pointB.Y < display.Y) then
-- Calculate the distance between pointA and pointB
distance = CalculateDistance(pointA.x, pointA.y, pointB.x, pointB.x)
end
end
function Draw()
-- Redraw the display
RedrawDisplay()
-- Clear the canvas with the background color
canvas:Clear(0)
-- Draw 2 circles around each point
canvas:DrawEllipse(pointA.x - 4, pointA.y - 4, 10, 10)
canvas:DrawEllipse(pointB.x - 4, pointB.y - 4, 10, 10)
-- Draw a line between the two points
canvas:DrawLine(pointA.x, pointA.y, pointB.x, pointB.y)
-- Draw the distance value above pointB
canvas:DrawText(tostring(distance), pointB.x, pointB.y - 12, "small", 14, - 4)
-- Draw the canvas to the display
canvas:DrawPixels()
--
DrawText("CalculateDistance()", 8, 8, DrawMode.Sprite, "large", 15)
DrawText("Lua Example", 8, 16, DrawMode.Sprite, "medium", 15, -4)
endnamespace PixelVision8.Player
{
class CalculateDistanceExample : GameChip
{
private Point pointA = new Point(8, 32);
private Point pointB = new Point(248, 232);
private Canvas canvas;
private int distance;
public override void Init()
{
// Create a new canvas and pass this GameChip into the constructor
canvas = new Canvas(256, 240, this);
// Set the canvas stroke to a white 1x1 pixel brush
canvas.SetStroke(14, 1);
}
public override void Update(int timeDelta)
{
// // Update position B with the MousePosition
pointB = MousePosition();
// Calculate the distance between pointA and pointB
distance = CalculateDistance(pointA.X, pointA.Y, pointB.X, pointB.X);
}
public override void Draw()
{
// Redraw the display
RedrawDisplay();
// // Clear the canvas with the background color
canvas.Clear(0);
// // Draw 2 circles around each point
canvas.DrawEllipse(pointA.X - 4, pointA.Y - 4, 10, 10);
canvas.DrawEllipse(pointB.X - 4, pointB.Y - 4, 10, 10);
// // Draw a line between the two points
canvas.DrawLine(pointA.X, pointA.Y, pointB.X, pointB.Y);
// // Draw the distance value above pointB
canvas.DrawText(distance.ToString(), pointB.X, pointB.Y - 12, "small", 14, -4);
// Draw the canvas to the display
canvas.DrawPixels();
// Example Title
DrawText("CalculateDistance()", 8, 8, DrawMode.Sprite, "large", 15);
DrawText("C Sharp Example", 8, 16, DrawMode.Sprite, "medium", 15, -4);
}
}
}