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Dark GDK / A Few questions i have. can you help please?

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Freedom Fighters
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Posted: 13th Jan 2010 11:23
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ok, i have a few questions that i need answering.

ok here they are

1 -> How do i draw a transparent box of that can be any size?
2 -> how do i find the 3d point of when the camera is looking when this line of sight hits and object?
3 -> Getting part of string (example: 10|15|32|) how do i get those three parts?
4 -> how cam i find a x2 point from x1 of length L in direction of D on the X Axis?

i rather post all my questions here than flood the forum.
hope you can hlep with one of them or more.

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Aldur
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Posted: 13th Jan 2010 11:40 Edited at: 13th Jan 2010 11:40
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1. 2D or 3D?
2. Look into dbPickObject/dbPickScreen

Here is an example:



I'm not sure for 3 and I don't understand 4.

Hope that helps a little.

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Freedom Fighters
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Posted: 13th Jan 2010 12:34
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1 -> 2d, its the drawing of 2d boxs

2 -> thanks for that. its helps me. now i know where to go.

3 -> i might be able to figure that one out.

4 -> um, say on the X Axis you have x1 as you start point and i want to find the second point that is X distance from x1 in the direction of D (direction) and that will give me x2.

example:
x1=12;Dir=0;Dis=12;x2=24
x1=12;Dir=90;Dis=12;x2=12
x1=12;Dir=45;Dis=12;x2=18

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Aldur
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Posted: 13th Jan 2010 13:23
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1. I'm not sure if you can draw transparent boxes, but what about a 4-line function to give a box outline?



4. I've got code around somewhere for that, i'll post it when I find it, its just trig but it's late and I can't think well at the moment.

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Hassan
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Posted: 13th Jan 2010 14:40 Edited at: 13th Jan 2010 14:40
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@ transparent box, maybe you can use any sprite,position it and scale it and set it's alpha to 0?

something like that

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Aldur
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Posted: 13th Jan 2010 15:37
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Yeah, you could do that!
You could even just use a 1x1 png that is fully transparent for the image

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Freedom Fighters
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Posted: 14th Jan 2010 05:54
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hmmmm. OK thanks for the idea for one. ill look into that.
well so far only 4 needs solving.
thanks for the help so far.

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Hassan
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Posted: 14th Jan 2010 12:56
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@ question 4

you are looking for the distance between two points?


or you mean, you have X1 as a start, and a direction, and you want
X2? i dont think you can get X2 without something like number of steps or something

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Freedom Fighters
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Posted: 14th Jan 2010 23:50
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i mean getting the furture x place in a direction of distance of any.

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Hassan
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Posted: 15th Jan 2010 09:08
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dunno the equation for this, but im sure you can:


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Freedom Fighters
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Posted: 15th Jan 2010 11:20
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hmm. sounds good. ill look into that.

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Freedom Fighters
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Posted: 16th Jan 2010 13:09 Edited at: 17th Jan 2010 00:08
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Aludur. you suggestion on my question 2 is good. i had a play around with the code. problem is that its aiming is a bit off.

ScreenShot - attached

from the screen shot it shows my problem.
the given point not were its sposed to be.
i don't make much sense of this.
heres the code that you gave me.


EDIT: Found the screen shot file. see attached.

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Aldur
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Posted: 16th Jan 2010 16:56 Edited at: 16th Jan 2010 16:56
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Your screenshot is a blank white bitmap.

But from your code, the reason I believe it's inaccurate is because you are using dbFloor() and possibly because your pick object distance is so small.

I haven't tested your code yet because I'm not on a pc with dgdk, but I will test it later and get back to you!

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Freedom Fighters
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Posted: 17th Jan 2010 00:11 Edited at: 18th Jan 2010 06:57
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well, dbFloor my own little function for rounding of numbers. even if i do take it away its still the same. i re-uploaded the screen shot

EDIT: dont worry. i fixed it. i tried this before my CSS.SystemAllUpDate(); that handles all the user input such as keyboard and mouse. i then figure i had to call that after.

as for four i re-looked in the documentation and it had what i needed

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Aldur
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Posted: 18th Jan 2010 08:29
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Glad you got it sorted

I was just about to post back.

For your dbFloor, wouldn't it be quicker to just include math.h and use the floor function?

Just an idea.

Good luck with your editor!

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