68 lines
2.0 KiB
Lua
68 lines
2.0 KiB
Lua
-- Based on JeffM2501 stencil_reflection example for Raylib https://github.com/raylib-extras/examples-cpp/blob/main/stencil_reflection/main.cpp
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package.path = package.path..";"..RL.GetBasePath().."../resources/lib/?.lua"
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Vec2 = require( "vector2" )
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Cam3D = require( "camera3d" )
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local monitor = 0
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local camera = Cam3D:new()
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function RL.init()
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RL.SetWindowTitle( "Stencil Reflection" )
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RL.SetWindowState( RL.FLAG_VSYNC_HINT )
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RL.SetWindowState( RL.FLAG_WINDOW_RESIZABLE )
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local mPos = Vec2:newT( RL.GetMonitorPosition( monitor ) )
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local mSize = Vec2:newT( RL.GetMonitorSize( monitor ) )
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local winSize = Vec2:newT( RL.GetScreenSize() )
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RL.SetWindowPosition( { mPos.x + mSize.x / 2 - winSize.x / 2, mPos.y + mSize.y / 2 - winSize.y / 2 } )
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camera:setPosition( { 0, 2, 6 } )
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camera:setTarget( { 0, 0, 0 } )
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camera:setUp( { 0, 1, 0 } )
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camera.mode = camera.MODES.ORBITAL
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end
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function RL.update( delta )
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camera:update( delta )
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if RL.IsKeyPressed( RL.KEY_SPACE ) then
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if camera.mode == camera.MODES.FREE then
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camera.mode = camera.MODES.FIRST_PERSON
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else
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camera.mode = camera.MODES.FREE
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end
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end
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end
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function RL.draw()
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RL.ClearBackground( RL.BLACK )
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camera:beginMode3D()
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RL.DrawCube( { 0, 0.5, 0 }, { 1, 1, 1 }, RL.DARKGREEN )
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RL.rlDrawRenderBatchActive()
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RL.glEnable( RL.GL_STENCIL_TEST )
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RL.glStencilFunc( RL.GL_ALWAYS, 1, 0xFF ) -- Set any stencil to 1
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RL.glStencilOp( RL.GL_KEEP, RL.GL_KEEP, RL.GL_REPLACE )
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RL.glStencilMask( 0xFF ) -- Write to stencil buffer.
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RL.rlDisableDepthMask()
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RL.glClear( RL.GL_STENCIL_BUFFER_BIT ) -- Clear stencil buffer (0 by default)
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RL.DrawPlane( { 0, 0, 0 }, { 3, 3 }, RL.DARKBLUE )
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RL.rlDrawRenderBatchActive()
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RL.glStencilFunc( RL.GL_EQUAL, 1, 0xFF ) -- Pass test if stencil value is 1.
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RL.glStencilMask( 0x00 ) -- Don't write anything to stencil buffer.
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RL.rlEnableDepthMask()
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RL.DrawCube( { 0, -0.5, 0 }, { 1, 1, 1 }, RL.ColorAlpha( RL.DARKGREEN, 0.5 ) )
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RL.rlDrawRenderBatchActive()
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RL.glDisable( RL.GL_STENCIL_TEST )
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camera:endMode3D()
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end
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