91 lines
2.5 KiB
Lua
91 lines
2.5 KiB
Lua
local ffi = require "ffi"
|
|
|
|
local screenWidth = 800
|
|
local screenHeight = 450
|
|
|
|
rl.SetConfigFlags(rl.FLAG_MSAA_4X_HINT)
|
|
|
|
rl.InitWindow(screenWidth, screenHeight, "Physac [raylua] - Physics demo")
|
|
local logoX = screenWidth - rl.MeasureText("Physac", 30) - 10
|
|
local logoY = 15
|
|
|
|
local needsReset = false
|
|
|
|
rl.InitPhysics()
|
|
|
|
local floor = rl.CreatePhysicsBodyRectangle({ screenWidth/2, screenHeight }, 500, 100, 10)
|
|
floor.enabled = false
|
|
|
|
local circle = rl.CreatePhysicsBodyCircle({ screenWidth/2, screenHeight/2 }, 45, 10)
|
|
circle.enabled = false
|
|
|
|
rl.SetTargetFPS(60)
|
|
|
|
while not rl.WindowShouldClose() do
|
|
rl.RunPhysicsStep()
|
|
|
|
if needsReset then
|
|
floor = rl.CreatePhysicsBodyRectangle({ screenWidth/2, screenHeight }, 500, 100, 10)
|
|
circle = rl.CreatePhysicsBodyCircle({ screenWidth/2, screenHeight/2 }, 45, 10)
|
|
|
|
floor.enabled = false
|
|
circle.enabled = false
|
|
|
|
needsReset = false
|
|
end
|
|
|
|
if rl.IsKeyPressed(string.byte("R")) then
|
|
rl.ResetPhysics()
|
|
needsReset = true
|
|
end
|
|
|
|
if rl.IsMouseButtonPressed(rl.MOUSE_LEFT_BUTTON) then
|
|
rl.CreatePhysicsBodyPolygon(rl.GetMousePosition(), rl.GetRandomValue(20, 80), rl.GetRandomValue(3, 8), 10);
|
|
elseif rl.IsMouseButtonPressed(rl.MOUSE_RIGHT_BUTTON) then
|
|
rl.CreatePhysicsBodyCircle(rl.GetMousePosition(), rl.GetRandomValue(10, 45), 10)
|
|
end
|
|
|
|
local bodiesCount = rl.GetPhysicsBodiesCount()
|
|
|
|
for i=0,bodiesCount do
|
|
local body = rl.GetPhysicsBody(i)
|
|
|
|
if body ~= nil and (body.position.y > screenHeight*2) then
|
|
print("Destroyed " .. tostring(body))
|
|
rl.DestroyPhysicsBody(body)
|
|
end
|
|
end
|
|
|
|
rl.BeginDrawing()
|
|
rl.ClearBackground(rl.BLACK)
|
|
|
|
bodiesCount = rl.GetPhysicsBodiesCount()
|
|
for i=0,bodiesCount-1 do
|
|
local body = rl.GetPhysicsBody(i)
|
|
|
|
if body ~= nil then
|
|
local vertexCount = rl.GetPhysicsShapeVerticesCount(i)
|
|
for j=0,vertexCount-1 do
|
|
local vertexA = rl.GetPhysicsShapeVertex(body, j);
|
|
|
|
local jj = ((j + 1) < vertexCount) and (j + 1) or 0
|
|
local vertexB = rl.GetPhysicsShapeVertex(body, jj);
|
|
|
|
rl.DrawLineV(vertexA, vertexB, rl.GREEN)
|
|
end
|
|
end
|
|
end
|
|
|
|
rl.DrawText("Left mouse button to create a polygon", 10, 10, 10, rl.WHITE);
|
|
rl.DrawText("Right mouse button to create a circle", 10, 25, 10, rl.WHITE);
|
|
rl.DrawText("Press 'R' to reset example", 10, 40, 10, rl.WHITE);
|
|
|
|
rl.DrawText("Physac", logoX, logoY, 30, rl.WHITE);
|
|
rl.DrawText("Powered by", logoX + 50, logoY - 7, 10, rl.WHITE);
|
|
|
|
rl.EndDrawing()
|
|
end
|
|
|
|
rl.ClosePhysics()
|
|
rl.CloseWindow()
|