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