[SOLVED] Rendering question

[maciek.mostowski]

Hi,

I'm new to unigine and i have a question:

Method void RenderLights::render_shadow_world(LightWorld *light,Vector<ObjectSurface*> *surfaces)  is used to create 

shadow maps for the world light ( sun, moon ). From what ive understood we obtain 2 buffers  : depth texture and color texture  for world light and later on these texture are used in fragment_light_world.shader (SHADOW_WORLD_VERTEX_PCF)

Question 1: 

How and when these texture samplers are passed to that fragment shader?

 

What i need to do is to do is to render the scene from the world light source and write for each visible point its normal, color (reflectance diffuse coefficient ) and depth in order to obtain reflective shadow map. 

Im new to unigine and any help could be useful.

Thanks,

 

 

[maciek.mostowski]

<p>Ive found setTexture(int shader,int num,Texture *texture) which binds texture to shaders. </p>

<p>I have a diffrent question about deffered shading. Where the information of the position  is stored?</p>

<p>In the structure </p>

<div>struct RenderDeferred {</div>

<div>Texture *depth_texture;</div>

<div>Texture *color_texture;</div>

<div>Texture *normal_texture;</div>

<div>Texture *parallax_texture;</div>

<div>Texture *ambient_texture;</div>

<div>Texture *light_texture;</div>

<div>TextureRender *texturerender;</div>

<div>};</div>

<div>i dont see it.</div>

<div>Is computed from  depth and viewport transformation somewhere?</div>

<div>Thanks,</div>

[unclebob]

Hi Maciek,

 

Sorrry for late reply. Hope you'll be happy with the answers. :)

 

Answer 1:

Depth & Color light textures are used in RenderLights::render_light_receive_surfaces method, here's call sequence:

RenderRenderer::render_world() -> shadow pass (rendering color & depth light textures) -> ... -> opaque objects pass -> RenderRenderer::render_scene_opacity() -> ... -> RenderLights::render_light_receive_surfaces() (using color & depth light textures) 

So basically, if you want to render additional textures, you should do that in shadow pass and use that textures in render_light_receive_surfaces. You'll need to update shaders as well.

 

 

Answer 2:

There's no position information stored in RenderDeferred. You're right, it's calculated from depth texture & viewport transformation in shader.