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-------------------------------------------------------------------------------------------
--
-- raylib [shaders] example - Apply a shader to some shape or texture
--
-- NOTE: This example requires raylib OpenGL 3.3 or ES2 versions for shaders support,
-- OpenGL 1.1 does not support shaders, recompile raylib to OpenGL 3.3 version.
--
-- NOTE: Shaders used in this example are #version 330 (OpenGL 3.3), to test this example
-- on OpenGL ES 2.0 platforms (Android, Raspberry Pi, HTML5), use #version 100 shaders
-- raylib comes with shaders ready for both versions, check raylib/shaders install folder
--
-- This example has been created using raylib 1.6 (www.raylib.com)
-- raylib is licensed under an unmodified zlib/libpng license (View raylib.h for details)
--
-- Copyright (c) 2014-2016 Ramon Santamaria (@raysan5)
--
-------------------------------------------------------------------------------------------
-- Initialization
-------------------------------------------------------------------------------------------
local screenWidth = 800
local screenHeight = 450
InitWindow(screenWidth, screenHeight, "raylib [shaders] example - shapes and texture shaders")
local sonic = LoadTexture("resources/texture_formats/sonic.png")
-- NOTE: Using GLSL 330 shader version, on OpenGL ES 2.0 use GLSL 100 shader version
local shader = LoadShader("resources/shaders/glsl330/base.vs",
"resources/shaders/glsl330/grayscale.fs")
-- Shader usage is also different than models/postprocessing, shader is just activated when required
SetTargetFPS(60) -- Set our game to run at 60 frames-per-second
-------------------------------------------------------------------------------------------
-- Main game loop
while not WindowShouldClose() do -- Detect window close button or ESC key
-- Update
---------------------------------------------------------------------------------------
-- TODO: Update your variables here
---------------------------------------------------------------------------------------
-- Draw
---------------------------------------------------------------------------------------
BeginDrawing()
ClearBackground(RAYWHITE)
-- Start drawing with default shader
DrawText("USING DEFAULT SHADER", 20, 40, 10, RED)
DrawCircle(80, 120, 35, DARKBLUE)
DrawCircleGradient(80, 220, 60, GREEN, SKYBLUE)
DrawCircleLines(80, 340, 80, DARKBLUE)
-- Activate our custom shader to be applied on next shapes/textures drawings
BeginShaderMode(shader)
DrawText("USING CUSTOM SHADER", 190, 40, 10, RED)
DrawRectangle(250 - 60, 90, 120, 60, RED)
DrawRectangleGradient(250 - 90, 170, 180, 130, MAROON, GOLD)
DrawRectangleLines(250 - 40, 320, 80, 60, ORANGE)
-- Activate our default shader for next drawings
EndShaderMode()
DrawText("USING DEFAULT SHADER", 370, 40, 10, RED)
DrawTriangle(Vector2(430, 80),
Vector2(430 - 60, 150),
Vector2(430 + 60, 150), VIOLET)
DrawTriangleLines(Vector2(430, 160),
Vector2(430 - 20, 230),
Vector2(430 + 20, 230), DARKBLUE)
DrawPoly(Vector2(430, 320), 6, 80, 0, BROWN)
-- Activate our custom shader to be applied on next shapes/textures drawings
BeginShaderMode(shader)
DrawTexture(sonic, 380, -10, WHITE) -- Using custom shader
-- Activate our default shader for next drawings
EndShaderMode()
EndDrawing()
---------------------------------------------------------------------------------------
end
-- De-Initialization
-------------------------------------------------------------------------------------------
UnloadShader(shader) -- Unload shader
UnloadTexture(sonic) -- Unload texture
CloseWindow() -- Close window and OpenGL context
-------------------------------------------------------------------------------------------
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