[PB 5.11] Where are the shadows?

[Bananenfreak]

Hiho,

here is a code. The code should display the issue that only one pair of shadows is working correct at the "same" time (Modulative and Additive or TexureAdditive). But in fact, I don´t see any shadow. What is the Problem with this code? I can´t see my issue...

Code: Select all

EnableExplicit

Define.i cube, light, cam, ground, cube_mesh, ground_mesh

InitEngine3D()
InitSprite()
InitKeyboard()

OpenScreen(1920, 1080, 32, "Test_0", #PB_Screen_SmartSynchronization)

cam = CreateCamera(#PB_Any, 0, 0, 100, 100)
MoveCamera(cam, 0, 20, 0, #PB_Absolute)
CameraLookAt(cam, 10, 0, 10)

;WorldShadows(#PB_Shadow_TextureAdditive, 100, RGB(255 * 0.2, 255 * 0.2, 255 * 0.2), 4096)
WorldShadows(#PB_Shadow_TextureAdditive, 100, RGB(0, 0, 0), 4096)

light = CreateLight(#PB_Any, RGB(255, 255, 255), 20, 10, 20, #PB_Light_Directional)
LightDirection(light, 0.4, -1, 0.2)
AmbientColor(RGB(85,85,85))

cube_mesh = CreateCube(#PB_Any, 2)
BuildMeshShadowVolume(cube_mesh)
cube = CreateEntity(#PB_Any, MeshID(cube_mesh), 0, 10, 1, 10)

ground_mesh = CreatePlane(#PB_Any, 20, 20, 1, 1, 1, 1)
BuildMeshShadowVolume(ground_mesh)
ground = CreateEntity(#PB_Any, MeshID(ground_mesh), 0, 10, 0, 10)

Repeat
  ClearScreen(RGB(0, 0, 0))
  
  ExamineKeyboard()
  
  RenderWorld()
  FlipBuffers()
Until KeyboardReleased(#PB_Key_Escape)

End

[Comtois]

add this line

Code: Select all

EntityRenderMode(ground, 0)

[Bananenfreak]

In the german Wiki, there is a entry:

#PB_Entity_CastShadow : Das Entity wirft einen Schatten, wenn WorldShadows() aktiviert wurde (Standard)

The Entity casts by default shadows, because Worldshadows is Default on.
Is this a issue in the wiki or not updated?

The english documentation:
http://www.purebasic.com/documentation/ ... rmode.html

Try this line:

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Debug #PB_Entity_CastShadow

You will receive a 4. What is the constant called "0"? Time for #PB_Entity_RecieveShadow, huh?

Ehm, next Problem:
Why this isn´t working correctly?

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EntityRenderMode(ground, 0 | #PB_Entity_CastShadow)
EntityRenderMode(cube, 0 | #PB_Entity_CastShadow)

[Bananenfreak]

Why this code is working with "TextureAdditive" but not with the other shadowtypes?!

Code: Select all

EnableExplicit

Define.i cube, light, cam, ground, cube_mesh, ground_mesh

InitEngine3D()
InitSprite()
InitKeyboard()

OpenScreen(1920, 1080, 32, "Test_0", #PB_Screen_SmartSynchronization)

cam = CreateCamera(#PB_Any, 0, 0, 100, 100)
MoveCamera(cam, 0, 20, 0, #PB_Absolute)
CameraLookAt(cam, 10, 0, 10)

WorldShadows(#PB_Shadow_TextureAdditive, 100, RGB(0, 0, 0), 4096) ;Additive and Modulative don´t work!

light = CreateLight(#PB_Any, RGB(255, 255, 255), 20, 10, 20, #PB_Light_Point)
;LightDirection(light, 0.4, -1, 0.2)
AmbientColor(RGB(85,85,85))

cube_mesh = CreateCube(#PB_Any, 2)
cube = CreateEntity(#PB_Any, MeshID(cube_mesh), 0, 10, 1, 10)
EntityRenderMode(cube, #PB_Entity_CastShadow)

ground_mesh = CreatePlane(#PB_Any, 20, 20, 1, 1, 1, 1)
ground = CreateEntity(#PB_Any, MeshID(ground_mesh), 0, 10, 0, 10)
EntityRenderMode(ground, 0);| #PB_Entity_CastShadow)

Repeat
  ClearScreen(RGB(0, 0, 0))
  
  ExamineKeyboard()
  
  RenderWorld()
  FlipBuffers()
Until KeyboardReleased(#PB_Key_Escape)

End

[Comtois]

Why this code is working with "TextureAdditive" but not with the other shadowtypes?!

All work fine here, even with this constant that is not documented "#PB_Shadow_TextureModulative = 5"

just changed light position :

Code: Select all

EnableExplicit

Define.i cube, light, cam, ground, cube_mesh, ground_mesh

InitEngine3D()
InitSprite()
InitKeyboard()

OpenScreen(1920, 1080, 32, "Test_0", #PB_Screen_SmartSynchronization)

cam = CreateCamera(#PB_Any, 0, 0, 100, 100)
MoveCamera(cam, 0, 20, 0, #PB_Absolute)
CameraLookAt(cam, 10, 0, 10)

WorldShadows(#PB_Shadow_TextureAdditive, 100, RGB(0, 0, 0), 4096) ;Additive and Modulative don´t work!

light = CreateLight(#PB_Any, RGB(255, 255, 255), 220, 210, 220, #PB_Light_Point)
;LightDirection(light, 0.4, -1, 0.2)
AmbientColor(RGB(85,85,85))

cube_mesh = CreateCube(#PB_Any, 2)
cube = CreateEntity(#PB_Any, MeshID(cube_mesh), 0, 10, 1, 10)
EntityRenderMode(cube, #PB_Entity_CastShadow)

ground_mesh = CreatePlane(#PB_Any, 20, 20, 1, 1, 1, 1)
ground = CreateEntity(#PB_Any, MeshID(ground_mesh), 0, 10, 0, 10)
EntityRenderMode(ground, 0)

Repeat
  ClearScreen(RGB(0, 0, 0))
 
  ExamineKeyboard()
 
  RenderWorld()
  FlipBuffers()
Until KeyboardReleased(#PB_Key_Escape)

End

[Bananenfreak]

Work fine? With PB 5.11 or 5.20 Beta? Fred fixed a few bugs with the Shadows... Here, on my PC, the TextureAdditive shadows are very low res and in case the other types don´t work.

[Olby]

Work fine? With PB 5.11 or 5.20 Beta? Fred fixed a few bugs with the Shadows... Here, on my PC, the TextureAdditive shadows are very low res and in case the other types don´t work.

With 5.20 beta 7 shadows are rendered in extremely low resolution.

[Bananenfreak]

Fred posted: Fixed.

Not really...

Did you test the other shadowtypes, too? Do they work correctly?

[Olby]

They all work, except the TextureAdditive gives really low resolution @ 4096.

[Bananenfreak]

Hmm, why TextureAdditive doesn´t work proper? 4096 is in my mind a medium to high Resolution for shadows...
If the light is near the cube, the shadow is correct. But as much as the light is away from the cube, the more the shadow will be in low Resolution. Is this a bug?

[Comtois]

extract from ogre's doc

The other issue is with point lights. Because texture shadows require a render to texture in the direction of the light, omnidirectional lights (point lights) would require 6 renders to totally cover all the directions shadows might be cast. For this reason, Ogre primarily supports directional lights and spotlights for generating texture shadows; you can use point lights but they will only work if off-camera since they are essentially turned into a spotlight shining into your camera frustum for the purposes of texture shadows.

[Bananenfreak]

Ok, i didn´t say anything