Real time lighting
Blitz3D Forums/Blitz3D Programming/Real time lighting
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| Can someone tell me why this doesn't work. The light in this scene(the sphere) is right next to the ground, well within the range of the light, only there is no light affecting the ground. Is this a limitation of real-time 3d or am I missing something? Graphics3D 640,480,32 SetBuffer BackBuffer() ;Make the ground plane = CreatePlane() ;Make the light AmbientLight 0,0,0 LRange# = 7 ;light range light = CreateLight(2) PositionEntity light,0,1,0 RotateEntity light,90,0,0 LightRange light,LRange# LightSphere = CreateSphere(4,light) EntityColor lightsphere,255,255,255 EntityFX lightsphere,1 ScaleEntity lightsphere,.2,.2,.2 ;Make the camera Camera = CreateCamera() PositionEntity Camera,0,4,-10 RotateEntity Camera,30,0,0 While Not KeyDown(1) UpdateWorld RenderWorld Flip Wend |
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| The Blitz lights only affect vertices, and a plane (like your ground) only has vertices at the corners of it. You can make it work by using CreatePlane(10), but it won't be pretty :) |
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| I guess that would be the reason why my low polygon models I make with Milkshape end up not looking right at certain angles when lights are used. |
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| They would if you used Dot3 lighting. However we still need a stronger implementation of it to have full control over how things look. |
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| What is Dot3 Lighting? |
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| Dot 3 = Normal maps = A texture where each texel contains the angle of the surface at that location. This allows you to make a flat surface appear to have more polygons than it really does. it's like bumpmapping, but better. And Blitz doesn't support it well enough at the moment to concern yourself with. It's an effect for advanced users anyhow and requires special programs to generate the maps, and high detail geometry for reference. Just make your floors have more polygons. Or look up how to use lightmaps. Dynamic lightmapping is what games like Unreal use. They don't use vertex lighting except for lighting the characters. |
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| why can't we have dynamic lightmapping in blitz? that would be ace or is there an implemenation of this already? |
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| Mark is working on it. There is basic functionality already in Blitz3D but it isn't really useful for much right now. |
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| Anyone mind explanin' what dynamic lightmapping is btw? |
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| Wait, I didn't read the word correctly when I replied. It sounds like it refers to lightmaps which are calculated on the fly. Is that right? In which case, how is that an advantage? |
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| well from what i was readin about it, it is kind of a lightmap for non static objects like characters etc. http://www.flipcode.com/tutorials/tut_advlightmaps.shtml |
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| Check out demo 2 in my sig. |
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| damn this pc, can't play stuff with it. its a good pentium 4, but it has a really old 8mb vid card. I will test it on my other one today |
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