From f1c718cce66e5651a0dae91375db6ebfaded1a92 Mon Sep 17 00:00:00 2001
From: Normand Briere <nbriere@noware.ca>
Date: Sat, 27 Apr 2019 21:33:41 -0400
Subject: [PATCH] Test unfold UV
---
BoundaryRep.java | 152 +++++++++++++++++++++++++++++++++++++++++++++++++-
1 files changed, 148 insertions(+), 4 deletions(-)
diff --git a/BoundaryRep.java b/BoundaryRep.java
index 4667636..05b3429 100644
--- a/BoundaryRep.java
+++ b/BoundaryRep.java
@@ -3155,7 +3155,27 @@
*/
}
- void GenUV()
+ void UnfoldUV()
+ {
+ for (int i = 0; i < VertexCount(); i++)
+ {
+ Vertex v = GetVertex(i);
+
+ v.x = v.s;
+ v.y = v.t;
+ v.z = 0;
+
+ v.norm.x = 0;
+ v.norm.y = 0;
+ v.norm.z = 1;
+
+ SetVertex(v, i);
+ }
+ }
+
+ float power = 2;
+
+ void GenUV() // float power)
{
Trim();
@@ -3219,6 +3239,115 @@
y -= 0.5;
z -= 0.5;
+ double ax = Math.abs(x);
+ double ay = Math.abs(y);
+ double max = ax;
+ if (max < ay)
+ {
+ max = ay;
+ }
+
+ x /= max;
+ y /= max;
+
+ double angle = Math.acos(Math.abs(z*2));
+
+ double k = angle / Math.PI * 2;
+
+ // k == 0 => uv = 0 (center)
+ // k == 1 => uv = -1,1 (border)
+
+ if (i == 0)
+ System.out.println("power = " + power);
+
+ double length1 = (ax+ay)/max;
+ double length2 = Math.sqrt(ax*ax + ay*ay) / max;
+
+ double t = k;
+
+ t = Math.pow(t, 3);
+
+ // Interpolate between k/length2 (center) and k (border)
+ k = k / length2 * (1 - t) + k * t;
+
+ double u = k*x;
+ double v = k*y;
+
+ u /= 2;
+ v /= 2;
+ u += 0.5;
+ v += 0.5;
+
+ uvmap[i2] = (float) u;
+ uvmap[i2+1] = (float) v;
+ }
+ }
+
+ void GenUVold(float power)
+ {
+ Trim();
+
+ cVector boxcenter = null;
+ cVector minima, maxima;
+ minima = new cVector();
+ maxima = new cVector();
+ minima.x = minima.y = minima.z = Double.MAX_VALUE;
+ maxima.x = maxima.y = maxima.z = -Double.MAX_VALUE;
+ for (int i = 0; i < VertexCount(); i++)
+ {
+ Vertex v = GetVertex(i);
+
+ if (minima.x > v.x)
+ {
+ minima.x = v.x;
+ }
+ if (minima.y > v.y)
+ {
+ minima.y = v.y;
+ }
+ if (minima.z > v.z)
+ {
+ minima.z = v.z;
+ }
+
+ if (maxima.x < v.x)
+ {
+ maxima.x = v.x;
+ }
+ if (maxima.y < v.y)
+ {
+ maxima.y = v.y;
+ }
+ if (maxima.z < v.z)
+ {
+ maxima.z = v.z;
+ }
+ }
+
+ boxcenter = new cVector((maxima.x + minima.x) / 2, (maxima.y + minima.y) / 2, (maxima.z + minima.z) / 2);
+ int i2 = 0, i3 = 0;
+ for (int i = 0; i < positions.length/3; i++, i3 += 3, i2 += 2)
+ {
+// //uvmap[i2] = (float) normals[i3]*0.5f + 0.5f; // v.x;
+// //uvmap[i2 + 1] = (float) normals[i3+1]*0.5f + 0.5f; //z;
+// uvmap[i2] = (float) (positions[i3] - boxcenter.x);
+// uvmap[i2 + 1] = (float) (positions[i3+2] - boxcenter.z);
+// uvmap[i2] = (float) Math.atan2(positions[i3+1] - boxcenter.y, positions[i3] - boxcenter.x);
+// uvmap[i2 + 1] = (float)(positions[i3+2] - boxcenter.z);
+ // box UV
+ double x = positions[i3] - minima.x; // - Math.floor(positions[i3]);
+ double y = positions[i3+1] - minima.y; // - Math.floor(positions[i3+1]);
+ double z = positions[i3+2] - minima.z; // - Math.floor(positions[i3+2]);
+
+ // [-1/2, 1/2]
+ x /= maxima.x - minima.x;
+ y /= maxima.y - minima.y;
+ z /= maxima.z - minima.z;
+
+ x -= 0.5;
+ y -= 0.5;
+ z -= 0.5;
+
// x *= 2;
// y *= 2;
// z *= 2;
@@ -3245,6 +3374,15 @@
z = Math.cos(angle/2);
+ assert(z >= 0);
+ assert(z <= 1);
+
+ /**/
+ //z = Math.pow(z, power); //1.08f);
+
+ if (i == 0)
+ System.out.println("power = " + power);
+
// sqrt(k2*x2 + k2*z2 + y2) = length
// k2*x2 + k2*z2 = length2 - y2
// k2 = (length2 - y2) / (x2 + z2)
@@ -3264,6 +3402,7 @@
x *= k;
y *= k;
+ /**/
double max = Math.abs(x);
if (max < Math.abs(y))
@@ -3276,10 +3415,15 @@
}
// max = Math.sqrt(max*2)/2;
+// double x2 = Math.pow(Math.abs(x), 1/power);
+// double y2 = Math.pow(Math.abs(y), 1/power);
+// double z2 = Math.pow(Math.abs(z), 1/power);
+// max = Math.pow(x2 + y2 + z2, power);
// if (!(max > 0))
- assert(max > 0);
-
+ //assert(max > 0);
+ assert(max >= 0);
+
x /= max;
y /= max;
z /= max;
@@ -4428,7 +4572,7 @@
}
}
- void CullVertex(javax.media.opengl.GL gl, boolean shadow)
+ void CullVertex(javax.media.opengl.GL glNOTUSED, boolean shadowNOTUSED)
{
CameraPane.glu.gluProject(vect5.x,vect5.y,vect5.z,
CameraPane.tempmat,0, CameraPane.tempmat2,0,
--
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