Torque3D OpenGL updates... advanced lighting

Advanced Lighting in OpenGL

GitHub: github.com/LuisAntonRebollo/Torque3D/tree/dev_opengl

A new update to the OpenGL code. It may be AL operating, the part of DX9 worked but you need to define "$pref::enablePostEffects = false;" in TorqueScript. I hope to continue to report project status at least 2 times a month in this forum: www.garagegames.com/community/forums/viewthread/133262/

Milestone 1: Render Full template correctly (more or less)

This is the first objective of the roadmap. For now I have to fix OpenGL rendering to face up in BL. When this all finished we will have to write documentation because there will be changes to the definition ShaderData, PostEffect and CustomMaterial. When you reach the milestone will write a new blog.

OpenGL renders always upside down

I'm trying to render OpenGL upside down to maintain cohesion between the texture coordinate systems between DX9/OpenGL and make it easier to keep and port code for the shaders. For now it is very simple, at the end of the shader invert Z gl_Position, is necesary invert cull too. . HLSL and GLSL now assume that the top-left starting textures.

DX and most graphics file formats use a Y coordinate system starts at the top-left, but in OpenGL begins below-left. Textures from files loaded upside down in OpenGL. RTT textures are created are correct. It's a small problem that also makes it harder to maintain backward shaders and unified shader languages as CG. Unity also solves this problem rendering upside down in OpenGL.

You will see much code that seems HLSL shader in OpenGL, I apologize but for now it is easier and faster to copy / paste. I will clean in future.

This brings a few problems:

• PostEffect has to differentiate when rendering to backbuffer, not rendered backwards.
• Basic OpenGL rendering ligthing need a texturea and then copy the backbuffer, this prevents use AA (the moment is rendered upside down BL)

DX samplers can not directly mapped to registers

OpenGL does not support direct mapping of the samplers, so now the information is extracted after compiling the shader. This makes the definition of ShaderData, CustomMaterial and PostEffect is more important to have that link textures with samplers and rtParams. I have to work harder the code, explain later.