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High!
Today I tried to build a mesh2 from the 24-bit heightfield I recently
generated from my original Ghurghusht isosurface (attached here)...
after completing the eval_pigment() scan of the heightfield, POV-Ray
crashed with an error message: "corrupted double-linked list" and a long
list of addresses...
Here is the relevant code:
#declare T_Ghurghusht=
texture
{
pigment { color rgb <0.98, 0.85, 0.45> }
finish { ambient 0.05 diffuse 1 brilliance 0.98 }
}
#if (tcm=0)
#declare Ghurghusht =
isosurface
{
function { Terrain_Function(x, y, z) }
contained_by { sphere { 0, 1 } }
max_gradient 5
accuracy 0.0001
double_illuminate
texture { T_Ghurghusht }
scale 5178
}
#else
#declare hf=
pigment
{
image_map
{
png "tiles/ghurghusht360_n05_040.png"
}
}
#declare sl=5124.6666;
#declare rng=31.5519+6.2452;
#declare ll=sl-6.2452;
#declare long=40;
#declare lat=5;
#declare Ghurghusht =
mesh2
{
vertex_vectors
{
1440000 // 1200 * 1200
#declare a=0;
#while (a<1200)
#declare b=0;
#while (b<1200)
#declare rd=eval_pigment(hf, <1/2400+b/1200, 2399/2400-a/1200, 0>).red;
#declare gr=eval_pigment(hf, <1/2400+b/1200, 2399/2400-a/1200,
0>).green/256;
#declare bl=eval_pigment(hf, <1/2400+b/1200, 2399/2400-a/1200,
0>).blue/65536;
(ll+(rd+gr+bl)*rng)*<sin(radians(-long-(10/3)*(1/2400+b/1200)))*cos(radians(lat-(10/3)*(1/2400+a/1200))),
sin(radians(lat-(10/3)*(1/2400+a/1200))),
cos(radians(-long-(10/3)*(1/2400+b/1200)))*cos(radians(lat-(10/3)*(1/2400+a/1200)))>
#declare b=b+1;
#end
#warning concat("Assigning vectors for line ", str(a, 4, 0))
#declare a=a+1;
#end
}
face_indices
{
2875202 // 1199 * 1199 * 2
#declare a = 0;
#while (a < 1199)
#declare b = 0;
#while (b < 1199)
<1200*a + b, 1200*a + b+1, 1200*(a+1) + b>,
<1200*a + b+1, 1200*(a+1) + b+1, 1200*(a+1) + b>
#if(b<(l-2))
,
#end
#declare b = b+1;
#end
#warning concat("Parsing lines ", str(a, 4, 0), " and ", str(a+1, 4,
0),".")
#declare a = a+1;
#end
}
texture { T_Ghurghusht }
}
#end
// end of code
Why?
See you in Khyberspace!
Yadgar
Now playing: I've Seen All Good People (Yes)
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Attachments:
Download 'ghurghusht360_n05_040.png' (3431 KB)
Preview of image 'ghurghusht360_n05_040.png'
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High!
Alain wrote:
> Personaly, I'd use that image directly as a hight_field.
Is POV-Ray nowadays able to use 24-bit heightfields? I never heard of
that...
But even if it would be possible, it will probably be of no use to me,
as my terrain relief should follow the curvature of the planet's surface!
See you in Khyberspace!
Yadgar
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