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Need help with some errors in my bilinear interpolation function
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Quote:
+---0,0---+---1,0---+
|? ? ? ? ?|? ? ? ? ?|...
|? ? ? ? ?|? ? ? ? ?|...
|? ? A ? ?|? ? B ? ?|...
|? ? ? ? ?|? ? ? ? ?|...
|? ? ? ? ?|? ? ? ? ?|...
+---0,1---+---1,1---+
|? ? ? ? ?|? ? ? ? ?|...
|? ? ? ? ?|? ? ? ? ?|...
|? ? C ? ?|? ?... |
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Posted September 28, 2009 5:49:24 PM
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averaging elevation
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Hey! I have a 2d-grid of squares. Each square contains it's own grid of lets say 11x11 squares. Every square also has an elevation value. I want to average out the elevation of the little squares within one of the larger squares with the surroun... |
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Posted September 27, 2009 9:00:02 PM
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[RESOLVED] functions w/ pointers as variables
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I don't like pointers and mostly try to avoid them, but there are some places where they would be very useful.
I have an object, regionMap, that contain vectors of vectors of another object, regionTile.
Can I create a function that takes a po... |
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Posted March 3, 2009 1:35:57 PM
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Muert RPG
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Muert RPG is a survival simulation/ randomly-generated role-playing game/ living world that is currently in development.
world-map zoom:
World-Map Zoom
animals animaling:
Animals Animaling
Game features include:
*randomly generated world
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Posted December 29, 2008 4:23:46 PM
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glListBase & differently sized structures created with call lists
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Ok - I have a 2d tile-based game that I display with quads that are looked at head-on.
I have each of the 16 x 16 tiles associated with a call list that I create.
I read the bmp into memeory then create the call lists at a certain size
then if I w... |
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Posted November 17, 2008 12:32:16 AM
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reading a txt file in c++ - so simple?!?
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I don't get it - I thought this stuff was easy!
( and yes - the first value read in from the text file is the 4th # in the output, I switched them around in the text file at some point when I was trying to figure this out)
Why is this the outpu... |
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Posted July 1, 2007 4:15:45 PM
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openGL kernel32 error
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Hey. I am trying to make my game more portable.
Does anybody have any idea what could be causing this error message and how I can go about solving it? That is all the information I have about the error. (I can run the program just fine on a... |
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Posted December 25, 2006 5:01:10 PM
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trying to port windows-centric bmp loader
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hey, I am trying to make my program more portable, and I have moved all my input to SDL and thought everything was ok. Except for my bmp reading function! It uses:
BITMAPFILEHEADER
BITMAPINFOHEADER
&
RGBTRIPLE
Does anybody have any good... |
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Posted December 23, 2006 7:48:32 PM
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more than 256 display lists
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I can't figure out how to do them.
I was using NeHe tutorial # 17 and changed it from 128 to 256 lists (GL_BYTE to GL_UNSIGNED_BYTE) and it works fine, but I can not figure out how to do more. I have the texture fine, all the measurements correct... |
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Posted October 10, 2006 10:22:57 PM
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changing colors of textures in openGL - [SOLVED]
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this was my problem.
glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
once I changed it to GL_BLEND it worked fine.
I can not figure out what I am doing wrong. I used one of the tutorials from spacesimu... |
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Posted September 25, 2006 1:52:16 PM
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View All Topics Started By This User
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| Some recent replies made on our forums |
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Need help with some errors in my bilinear interpolation function
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I've got to thank you for all your help, iMalc!
This is what I wound up doing (I broke up the function into a couple of different code quotes because it is kind of long):
void smoothifyRegion(int wX, int wY, int aX, int aY)
{
std::stringstr... |
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Posted October 2, 2009 1:05:34 AM
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Need help with some errors in my bilinear interpolation function
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I think I am just missing some minor step in my function somewhere -
I need 'e' to only take into account 5 & 2, because at that point, both 4 & 7 and 1 & 8 should have 0% influence on the value
I only have odd sized maps at this... |
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Posted September 30, 2009 6:30:36 PM
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Need help with some errors in my bilinear interpolation function
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Yeah, that code is pretty funked up -
the lowercase n, ne, e, se, s, sw, w & nw are the surrounding big square's base elevation values (or the A, B & D in the example where we try to calculate the values for the C square - the A would be n, the B w... |
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Posted September 30, 2009 2:49:22 PM
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Need help with some errors in my bilinear interpolation function
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I don't really understand -
so if I do something like your diagram to calculate only the central 5-value square:
+---+---+---+
|5??|?1?|??4|
|???|???|???|
|???|???|???|
+---+---+---+
|???|???|???|
|9??|?5?|??2|
|???|???|???|
+---+... |
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Posted September 30, 2009 2:36:17 PM
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Need help with some errors in my bilinear interpolation function
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Thanks for the thorough description iMalc!
I don't think I explained the specifics of my problem very well or else I am not completely understanding your explanation.
I am not doing anything with graphics, I let openGL handle all of the resa... |
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Posted September 30, 2009 1:22:41 AM
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Need help with some errors in my bilinear interpolation function
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The code seems to be interpolating correctly within each quadrant, but the 4 quadrants don't line up correctly. And there are those little low elevation squares (the little blue squares evenly spaced around) that mark the exact center of each square.... |
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Posted September 28, 2009 5:56:13 PM
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averaging elevation
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ok - now I am having trouble with implementation:
for(int pix = 0; pix < RMAP_X; pix++)
{
for(int piy = 0; piy < RMAP_Y; piy++)
{
quadrant = -1;
if(pix < (halfRMAP_X) && piy <(halfRMAP_Y))
{
quadrant =... |
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Posted September 28, 2009 2:11:35 PM
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averaging elevation
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Hodgman, that is basically what I was picturing, but it seems so much easier the way you wrote it out than the way I was envisioning it. Thanks! |
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Posted September 28, 2009 10:57:11 AM
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[RESOLVED] functions w/ pointers as variables
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yeah, that is exactly what I am looking for - thanks SriLumpa! |
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Posted March 3, 2009 4:13:20 PM
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[RESOLVED] functions w/ pointers as variables
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I am sure it is something as simple as that. Now how do I pick which regionTile[pix][piy].var1, var2, or var3 the function edits? |
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Posted March 3, 2009 3:56:44 PM
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