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SCORPION
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« Reply #96 on: November 13, 2013, 12:15:51 AM » |
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I remembered and was able to reproduce the effect of " ping- pong " when zooming . This occurs when the process of changing the step size of the zoom zoom. That is done keyframe. Then he began to approach the left mouse wheel . Small step , decided to increase the step zoom. When fractal close , we must again umentshit step size to seamlessly fly up . As a result, the effect is " ping - pong " when the camera flies in the fractal, flying out of it, and only then stays there , where there has been a third key frame. Here tataki very unpleasant effect . (((( Horrible machine translation. It is hoped that you will understand me.
I, too, you hardly know. (((((
#info Mandelbulb Distance Estimator
#define providesInit
#include "DE-Raytracer.frag"
#include "MathUtils.frag"
#group Mandelbulb
// Number of fractal iterations.
uniform int Iterations; slider[0,9,100]
// Number of color iterations.
uniform int ColorIterations; slider[0,9,100]
// Mandelbulb exponent (8 is standard)
uniform float Power; slider[0,8,16]
// Bailout radius
uniform float Bailout; slider[0,5,30]
// Alternate is slightly different, but looks more like a Mandelbrot for Power=2
uniform bool AlternateVersion; checkbox[false]
uniform vec3 RotVector; slider[(0,0,0),(1,1,1),(1,1,1)]
uniform float RotAngle; slider[0.00,0,180]
mat3 rot;
uniform float time;
void init() {
rot = rotationMatrix3(normalize(RotVector), RotAngle);
float dummy = time*10.0;
}
// This is my power function, based on the standard spherical coordinates as defined here:
// http://en.wikipedia.org/wiki/Spherical_coordinate_system
//
// It seems to be similar to the one Quilez uses:
// http://www.iquilezles.org/www/articles/mandelbulb/mandelbulb.htm
//
// Notice the north and south poles are different here.
void powN1(inout vec3 z, float r, inout float dr) {
// extract polar coordinates
float theta = acos(z.z/r);
float phi = atan(z.y,z.x);
dr = pow( r, Power-1.0)*Power*dr + 1.0;
// scale and rotate the point
float zr = pow( r,Power);
theta = theta*Power;
phi = phi*Power;
// convert back to cartesian coordinates
z = zr*vec3(sin(theta)*cos(phi), sin(phi)*sin(theta), cos(theta));
}
// This is a power function taken from the implementation by Enforcer:
// http://www.fractalforums.com/mandelbulb-implementation/realtime-renderingoptimisations/
//
// I cannot follow its derivation from spherical coordinates,
// but it does give a nice mandelbrot like object for Power=2
void powN2(inout vec3 z, float zr0, inout float dr) {
float zo0 = asin( z.z/zr0 );
float zi0 = atan( z.y,z.x );
float zr = pow( zr0, Power-1.0 );
float zo = zo0 * Power;
float zi = zi0 * Power;
dr = zr*dr*Power + 1.0;
zr *= zr0;
z = zr*vec3( cos(zo)*cos(zi), cos(zo)*sin(zi), sin(zo) );
}
uniform bool Julia; checkbox[false]
uniform vec3 JuliaC; slider[(-2,-2,-2),(0,0,0),(2,2,2)]
// Compute the distance from `pos` to the Mandelbox.
float DE(vec3 pos) {
vec3 z=pos;
float r;
float dr=1.0;
int i=0;
r=length(z);
while(r<Bailout && (i<Iterations)) {
if (AlternateVersion) {
powN2(z,r,dr);
} else {
powN1(z,r,dr);
}
z+=(Julia ? JuliaC : pos);
r=length(z);
z*=rot;
if (i<ColorIterations) orbitTrap = min(orbitTrap, abs(vec4(z.x,z.y,z.z,r*r)));
i++;
}
// if ((type==1) && r<Bailout) return 0.0;
return 0.5*log(r)*r/dr;
/*
Use this code for some nice intersections (Power=2)
float a = max(0.5*log(r)*r/dr, abs(pos.y));
float b = 1000;
if (pos.y>0) b = 0.5*log(r)*r/dr;
return min(min(a, b),
max(0.5*log(r)*r/dr, abs(pos.z)));
*/
}
#preset Default
FOV = 0.62536
Eye = 1.65826,-1.22975,0.277736
Target = -5.2432,4.25801,-0.607125
Up = 0.401286,0.369883,-0.83588
EquiRectangular = false
FocalPlane = 1
Aperture = 0
Gamma = 2.08335
ToneMapping = 3
Exposure = 0.6522
Brightness = 1
Contrast = 1
Saturation = 1
GaussianWeight = 1
AntiAliasScale = 2
Detail = -2.84956
DetailAO = -1.35716
FudgeFactor = 1
MaxRaySteps = 164
Dither = 0.51754
NormalBackStep = 1
AO = 0,0,0,0.85185
Specular = 1.6456
SpecularExp = 16.364
SpecularMax = 10
SpotLight = 1,1,1,1
SpotLightDir = 0.63626,0.5
CamLight = 1,1,1,1.53846
CamLightMin = 0.12121
Glow = 1,1,1,0.43836
GlowMax = 52
Fog = 0
HardShadow = 0.35385
ShadowSoft = 12.5806
Reflection = 0
DebugSun = false
BaseColor = 1,1,1
OrbitStrength = 0.14286
X = 1,1,1,1
Y = 0.345098,0.666667,0,0.02912
Z = 1,0.666667,0,1
R = 0.0784314,1,0.941176,-0.0194
BackgroundColor = 0.607843,0.866667,0.560784
GradientBackground = 0.3261
CycleColors = false
Cycles = 4.04901
EnableFloor = false
FloorNormal = 0,0,0
FloorHeight = 0
FloorColor = 1,1,1
Iterations = 12
ColorIterations = 8
Power = 8
Bailout = 6.279
AlternateVersion = true
RotVector = 1,1,1
RotAngle = 0
Julia = false
JuliaC = 0,0,0
#endpreset
#preset Octobulb
FOV = 0.62536
Eye = -0.184126,0.843469,1.32991
Target = 1.48674,-5.55709,-4.56665
Up = -0.240056,-0.718624,0.652651
AntiAlias = 1
Detail = -2.47786
DetailAO = -0.21074
FudgeFactor = 1
MaxRaySteps = 164
BoundingSphere = 2
Dither = 0.5
AO = 0,0,0,0.7
Specular = 1
SpecularExp = 27.082
SpotLight = 1,1,1,0.94565
SpotLightDir = 0.5619,0.18096
CamLight = 1,1,1,0.23656
CamLightMin = 0.15151
Glow = 0.415686,1,0.101961,0.18421
Fog = 0.60402
HardShadow = 0.72308
Reflection = 0
BaseColor = 1,1,1
OrbitStrength = 0.62376
X = 0.411765,0.6,0.560784,-0.37008
Y = 0.666667,0.666667,0.498039,0.86886
Z = 0.666667,0.333333,1,-0.25984
R = 0.4,0.7,1,0.36508
BackgroundColor = 0.666667,0.666667,0.498039
GradientBackground = 0.5
CycleColors = true
Cycles = 7.03524
FloorNormal = 0,0,0
FloorHeight = 0
FloorColor = 1,1,1
Iterations = 14
ColorIterations = 6
Power = 8.18304
Bailout = 6.279
AlternateVersion = true
RotVector = 1,0,0
RotAngle = 77.8374
#endpreset
#preset KeyFrame.001
FOV = 0.62536
Eye = 34.2122,-27.1153,4.45159
Target = 27.3107,-21.6275,3.56673
Up = 0.401286,0.369883,-0.83588
#endpreset
#preset KeyFrame.002
FOV = 0.62536
Eye = 2.2424,-1.69419,0.352655
Target = -4.6591,3.79361,-0.532205
Up = 0.401286,0.369883,-0.83588
#endpreset
#preset KeyFrame.003
FOV = 0.62536
Eye = 0.808919,-0.554342,0.168864
Target = -6.09258,4.93346,-0.715996
Up = 0.401286,0.369883,-0.83588
#endpreset |
January 25, 2011, 07:56:58 PM
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