[SOLVED] Render post-process, model lighting by passing uniforms to shaders also predetermined movement for models, camera and such

Questions
#1

Hi,

I have some questions.
#1st Question - Render post-process
I’m familiar with GLSL but I’m wondering how to use materials with render objects? Lets say I want to apply anti-alias to my final rendered scene, how do I apply it? I have my anti-alias GLSL code ready but how do I get the render objects result as a texture to my fragment shader so I can modify the scene to have anti-alias?
#2nd Question - Passing scene lighting information to model material
What is the correct way to pass scenes lighting information to a models material?
#3rd Question - Can you easily add rubber banded movement to models, lights and camera in Defold?
I would like to predetermine the path camera, lights and models should move in. What would be the most easiest way to achieve this in Defold?

Thank You.

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#2

  1. Check out http://www.defold.com/doc/materials

  2. The light component is very old and should not be used. Don’t know if it works at all. Maybe you could pass light info through a Lua table that you generate externally?

  3. There is no path object so you will have to find an alternate way of doing it. Maybe a bezier function that uses the positions of game objects (hard to edit, though)? Otherwise you need to import the data into a Lua structure so you can use it.

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#3

To do post-processing you can use render targets. Create a new target with:

local color_params = { format = render.FORMAT_RGBA,
                   width = render.get_window_width(),
                   height = render.get_window_height(),
                   min_filter = render.FILTER_LINEAR,
                   mag_filter = render.FILTER_LINEAR,
                   u_wrap = render.WRAP_CLAMP,
                   v_wrap = render.WRAP_CLAMP }
var my_target = render.render_target("ungraded", {[render.BUFFER_COLOR_BIT] = color_params })

To render to a target use:

render.enable_render_target(my_target)

And when you want to use the target as a texture source:

render.enable_texture(0, my_target, render.BUFFER_COLOR_BIT)
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#4

This clears up a lot. Thank You!

1 Like