![]() Anything we draw here will distort the screenĭraw_sprite(spr_example_distort,0,500,500) Surface_distort = surface_create(room_width,room_height) name of what you want it to be called in the shaderĭistortion_stage = shader_get_sampler_index(shader_fullscreen, "distortion_texture_page") Now that we have the shader we need to apply it to something ![]() Gl_FragColor = v_vColour * texture2D( gm_BaseTexture, v_vTexcoord+distort_amount) If (distort_amount.x > 0.5) // wrap around normal maps have green pointing the wrong way)ĭistort_amount.x = 1.0 - distort_amount.x while you dont need to worry about it in GM more FOR NORMAL MAPS: ( either directX or OpenGL flip the green channel, Vec2 distort_amount = vec2( (v_vColour * texture2D( distortion_texture_page, v_vTexcoord)).xy) find the offset colour for this location (this is where the magic happens) Uniform sampler2D distortion_texture_page // the name of the surface in the shader This shader will look at the surface and for every pixel on the surface the colour will tell the shader where to offset when selecting what colour to draw. We will only be using the Fragment Shader which in GameMaker is the second tab along, this code runs on the graphics card for every pixel on the screen. This works just like a lens.įirst we are going to make a new shader with Alt+A and you will notice it comes as two files, the Vertex Shader and the Fragment Shader. The concept is very simple, we are going to pass a Surface into the shader with all the information about where each pixel should actually draw to the screen. Today I will show you how to make a shader to warp your screen and add ripples and other distortions to your games. Please note this if you are joining with the intention of writing articles for GameMaker Wiki.I know shaders can seem like a scary world for some however in just a few lines of code I want to give you an easy to implement and impressive shader that will be a great starting point for learning your first shader. At this point, you are still free to copy and distribute, but with a name check. If credit is needed to copy an article or tutorial, you will see Written by on the bottom of the article. What's the copyright status of GameMaker Wiki's content?Īll items on GameMaker Wiki are, and shall remain, free to copy and paste elsewhere and distribute. See the Members page for full staff and member lists. It's now excellent and can provide you all the support you need (if they don't have the answer already written, their customer support team can help). Since GameMaker Wiki was first created, YoYo Games have made vast improvements to their first-party help system. ![]() Need help with GameMaker: Studio?Īt present, a lot of the help on this wiki is outdated and is predominantly focused on GameMaker before the GameMaker HTML5 and Studio iterations. ![]() Once you are a member, please check the Editors' Guides section so when you edit or create new content for pages, you keep with the theme of alike pages. Registered members may edit, create and remove content from GameMaker Wiki. Want to edit GameMaker Wiki?Ībsolutely anyone is welcome to help keep GameMaker Wiki up to date! You will need to register before doing so, but then you are free to add whatever you like. The navbar to the left allows for easy access to different portals so you can find exactly what you want, when you want it.Īlternatively, if you want to find a particular item, use the search bar on the top right of every page. This Wiki will hopefully be a comprehensive guide to GameMaker: Studio, its users, and its users' creations. ![]()
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