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AppGameKit Classic Chat / Help with normals

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blink0k
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Posted: 21st Mar 2018 01:52 Edited at: 21st Mar 2018 01:52
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Trying to get normals to work and not having any luck. (attached project)
Could someone tell me what i am doing wrong here please.
Thanks

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Phaelax
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Posted: 21st Mar 2018 10:15
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I can't open rar at work so I'll just take a random guess, when you calculate the normals are the verts in the right order? If they're reversed, the normal will point in the opposite direction and leave you seeing the backface.
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Blendman
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Posted: 21st Mar 2018 10:28 Edited at: 21st Mar 2018 10:30
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Hi


- Your diffuse texture isn't very good with normalmap, so you can't see your normalmap.
- your ambient is too bright
- the main issue : AppGameKit doesn't have specular, so, we don't see the normalmap in some case because we haven't specular light. Another issue : we can change the intensity of the normalmap in the code, we have to create a shader for that, that's not cool ^^.

I have changed your code & textures to see the normalmap. it works fine now .



But we need specular in the agk shader to get better result !
AGK2 tier1 - http://www.dracaena-studio.com

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Bengismo
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Posted: 21st Mar 2018 11:12
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He wasnt really doing much wrong to start with.

Blendman your point light is in Vertex mode so wont actually use the normal map...lol. You can tell it doesnt as the normal map a has no effect as it rotates. Normal mapping is a per fragment effect and needs lights that operate in that mode (otherwise the normal map isnt actually being used!

Ive attached a version that looks better and actually uses the normal map properly rather than attaching a vertex point light.

You dont actually NEED a specular shader to see the lighting effect of the normal map. Plus adding a specular shader yourself is pretty easy and can give you even better effects!

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basicFanatic
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Posted: 21st Mar 2018 12:10
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Bengismo wrote: " Plus adding a specular shader yourself is pretty easy and can give you even better effects!"


A little example would be so nice!
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Bengismo
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Posted: 21st Mar 2018 12:32 Edited at: 21st Mar 2018 12:33
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basicFantastic wrote: "A little example would be so nice! "


I already posted one!

https://forum.thegamecreators.com/thread/221784#msg2621472
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Blendman
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Posted: 21st Mar 2018 14:35
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I think basicfantasic would say : an exemple of code
+1 for an example of code .
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Phaelax
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Posted: 21st Mar 2018 16:31
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Guess I was way off. I should just stay quiet in matters of 3D.
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blink0k
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Posted: 21st Mar 2018 19:10
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Thanks guys. Absolutely super helpful!
One question for blendo: You desaturated the texture right?
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Blendman
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Posted: 21st Mar 2018 19:16
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Blink :
No, i have changed the gamma, brightness and contraste. Not touch the saturation
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blink0k
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Posted: 21st Mar 2018 19:17
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To try and reduce the range of brightness? I'm guessing?
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Blendman
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Posted: 21st Mar 2018 20:01
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To see the normalmap
With the black colors in the image, I didnt see the normalmap.
It was only to test.
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blink0k
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Posted: 21st Mar 2018 20:06
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ok. thanks
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blink0k
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Posted: 23rd Mar 2018 00:45 Edited at: 23rd Mar 2018 02:31
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I think the lesson i learned here is let the shader do it's job


One other question;
Does anyone have an example of a light map texture and it's use?

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hoyoyo80
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Posted: 23rd Mar 2018 03:18
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Good topic blinkok! I havent touch so much on shader, im aiming at psp level quality only.
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blink0k
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Posted: 23rd Mar 2018 03:34 Edited at: 23rd Mar 2018 03:36
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Setting PointLightMode() to pixel lighting makes a big difference
Thanks Bengismo!

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