@Override
protected List<Vec4> computeMinimalGeometry(Globe globe, double verticalExaggeration) {
double[] angles = this.computeAngles();
// Angles are equal, fall back to building a closed cylinder.
if (angles == null) return super.computeMinimalGeometry(globe, verticalExaggeration);
double[] radii = this.getRadii();
Matrix transform = this.computeTransform(globe, verticalExaggeration);
GeometryBuilder gb = this.getGeometryBuilder();
int count = gb.getPartialDiskVertexCount(MINIMAL_GEOMETRY_SLICES, MINIMAL_GEOMETRY_LOOPS);
int numCoords = 3 * count;
float[] verts = new float[numCoords];
gb.makePartialDiskVertices(
(float) radii[0],
(float) radii[1], // Inner radius, outer radius.
MINIMAL_GEOMETRY_SLICES,
MINIMAL_GEOMETRY_LOOPS, // Slices, loops,
(float) angles[0],
(float) angles[2], // Start angle, sweep angle.
verts);
List<LatLon> locations = new ArrayList<LatLon>();
for (int i = 0; i < numCoords; i += 3) {
Vec4 v = new Vec4(verts[i], verts[i + 1], verts[i + 2]);
v = v.transformBy4(transform);
locations.add(globe.computePositionFromPoint(v));
}
ArrayList<Vec4> points = new ArrayList<Vec4>();
this.makeExtremePoints(globe, verticalExaggeration, locations, points);
return points;
}
private void makeRadialWallTerrainConformant(
DrawContext dc,
int pillars,
int stacks,
float[] verts,
double[] altitudes,
boolean[] terrainConformant,
Vec4 referenceCenter) {
Globe globe = dc.getGlobe();
Matrix transform = this.computeTransform(dc.getGlobe(), dc.getVerticalExaggeration());
for (int p = 0; p <= pillars; p++) {
int index = p;
index = 3 * index;
Vec4 vec = new Vec4(verts[index], verts[index + 1], verts[index + 2]);
vec = vec.transformBy4(transform);
Position pos = globe.computePositionFromPoint(vec);
for (int s = 0; s <= stacks; s++) {
double elevation = altitudes[s];
if (terrainConformant[s])
elevation += this.computeElevationAt(dc, pos.getLatitude(), pos.getLongitude());
vec = globe.computePointFromPosition(pos.getLatitude(), pos.getLongitude(), elevation);
index = p + s * (pillars + 1);
index = 3 * index;
verts[index] = (float) (vec.x - referenceCenter.x);
verts[index + 1] = (float) (vec.y - referenceCenter.y);
verts[index + 2] = (float) (vec.z - referenceCenter.z);
}
}
}
private void makePartialDiskTerrainConformant(
DrawContext dc,
int numCoords,
float[] verts,
double altitude,
boolean terrainConformant,
Vec4 referenceCenter) {
Globe globe = dc.getGlobe();
Matrix transform = this.computeTransform(dc.getGlobe(), dc.getVerticalExaggeration());
for (int i = 0; i < numCoords; i += 3) {
Vec4 vec = new Vec4(verts[i], verts[i + 1], verts[i + 2]);
vec = vec.transformBy4(transform);
Position p = globe.computePositionFromPoint(vec);
double elevation = altitude;
if (terrainConformant)
elevation += this.computeElevationAt(dc, p.getLatitude(), p.getLongitude());
vec = globe.computePointFromPosition(p.getLatitude(), p.getLongitude(), elevation);
verts[i] = (float) (vec.x - referenceCenter.x);
verts[i + 1] = (float) (vec.y - referenceCenter.y);
verts[i + 2] = (float) (vec.z - referenceCenter.z);
}
}
private void makePartialCylinderTerrainConformant(
DrawContext dc,
int slices,
int stacks,
float[] verts,
double[] altitudes,
boolean[] terrainConformant,
Vec4 referenceCenter) {
Globe globe = dc.getGlobe();
Matrix transform = this.computeTransform(dc.getGlobe(), dc.getVerticalExaggeration());
for (int i = 0; i <= slices; i++) {
int index = i * (stacks + 1);
index = 3 * index;
Vec4 vec = new Vec4(verts[index], verts[index + 1], verts[index + 2]);
vec = vec.transformBy4(transform);
Position p = globe.computePositionFromPoint(vec);
for (int j = 0; j <= stacks; j++) {
double elevation = altitudes[j];
if (terrainConformant[j])
elevation += this.computeElevationAt(dc, p.getLatitude(), p.getLongitude());
vec = globe.computePointFromPosition(p.getLatitude(), p.getLongitude(), elevation);
index = j + i * (stacks + 1);
index = 3 * index;
verts[index] = (float) (vec.x - referenceCenter.x);
verts[index + 1] = (float) (vec.y - referenceCenter.y);
verts[index + 2] = (float) (vec.z - referenceCenter.z);
}
}
}
private void makeCap(
DrawContext dc,
GeometryBuilder.IndexedTriangleArray ita,
double altitude,
boolean terrainConformant,
int orientation,
Matrix locationTransform,
Vec4 referenceCenter,
int indexPos,
int[] indices,
int vertexPos,
float[] vertices,
float[] normals) {
GeometryBuilder gb = this.getGeometryBuilder();
Globe globe = dc.getGlobe();
int indexCount = ita.getIndexCount();
int vertexCount = ita.getVertexCount();
int[] locationIndices = ita.getIndices();
float[] locationVerts = ita.getVertices();
this.copyIndexArray(
indexCount,
(orientation == GeometryBuilder.INSIDE),
locationIndices,
vertexPos,
indexPos,
indices);
for (int i = 0; i < vertexCount; i++) {
int index = 3 * i;
Vec4 vec = new Vec4(locationVerts[index], locationVerts[index + 1], locationVerts[index + 2]);
vec = vec.transformBy4(locationTransform);
Position pos = globe.computePositionFromPoint(vec);
vec =
this.computePointFromPosition(
dc, pos.getLatitude(), pos.getLongitude(), altitude, terrainConformant);
index = 3 * (vertexPos + i);
vertices[index] = (float) (vec.x - referenceCenter.x);
vertices[index + 1] = (float) (vec.y - referenceCenter.y);
vertices[index + 2] = (float) (vec.z - referenceCenter.z);
}
gb.makeIndexedTriangleArrayNormals(
indexPos, indexCount, indices, vertexPos, vertexCount, vertices, normals);
}
private void makeSectionVertices(
DrawContext dc,
int locationPos,
float[] locations,
double[] altitude,
boolean[] terrainConformant,
int subdivisions,
Matrix locationTransform,
Vec4 referenceCenter,
int vertexPos,
float[] vertices) {
GeometryBuilder gb = this.getGeometryBuilder();
int numPoints = gb.getSubdivisionPointsVertexCount(subdivisions);
Globe globe = dc.getGlobe();
int index1 = 3 * locationPos;
int index2 = 3 * (locationPos + 1);
float[] locationVerts = new float[3 * numPoints];
gb.makeSubdivisionPoints(
locations[index1],
locations[index1 + 1],
locations[index1 + 2],
locations[index2],
locations[index2 + 1],
locations[index2 + 2],
subdivisions,
locationVerts);
for (int i = 0; i < numPoints; i++) {
int index = 3 * i;
Vec4 vec = new Vec4(locationVerts[index], locationVerts[index + 1], locationVerts[index + 2]);
vec = vec.transformBy4(locationTransform);
Position pos = globe.computePositionFromPoint(vec);
for (int j = 0; j < 2; j++) {
vec =
this.computePointFromPosition(
dc, pos.getLatitude(), pos.getLongitude(), altitude[j], terrainConformant[j]);
index = 2 * i + j;
index = 3 * (vertexPos + index);
vertices[index] = (float) (vec.x - referenceCenter.x);
vertices[index + 1] = (float) (vec.y - referenceCenter.y);
vertices[index + 2] = (float) (vec.z - referenceCenter.z);
}
}
}