@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 makeRadialWall(
DrawContext dc,
double[] radii,
double angle,
double[] altitudes,
boolean[] terrainConformant,
int pillars,
int stacks,
int orientation,
Vec4 referenceCenter,
Geometry dest) {
GeometryBuilder gb = this.getGeometryBuilder();
gb.setOrientation(orientation);
float height = (float) (altitudes[1] - altitudes[0]);
int count = gb.getRadialWallVertexCount(pillars, stacks);
int numCoords = 3 * count;
float[] verts = new float[numCoords];
float[] norms = new float[numCoords];
gb.makeRadialWallVertices(
(float) radii[0], (float) radii[1], height, (float) angle, pillars, stacks, verts);
this.makeRadialWallTerrainConformant(
dc, pillars, stacks, verts, altitudes, terrainConformant, referenceCenter);
gb.makeRadialWallNormals(
(float) radii[0], (float) radii[1], height, (float) angle, pillars, stacks, norms);
dest.setVertexData(count, verts);
dest.setNormalData(count, norms);
}
private void makeSectionOutlineIndices(
int subdivisions,
int vertexPos,
int indexPos,
int[] indices,
boolean beginEdgeFlag,
boolean endEdgeFlag) {
GeometryBuilder gb = this.getGeometryBuilder();
int count = gb.getSubdivisionPointsVertexCount(subdivisions);
int index = indexPos;
int pos, nextPos;
if (beginEdgeFlag) {
pos = vertexPos;
indices[index++] = pos;
indices[index++] = pos + 1;
}
for (int i = 0; i < count - 1; i++) {
pos = vertexPos + 2 * i;
nextPos = vertexPos + 2 * (i + 1);
indices[index++] = pos;
indices[index++] = nextPos;
indices[index++] = pos + 1;
indices[index++] = nextPos + 1;
}
if (endEdgeFlag) {
pos = vertexPos + 2 * (count - 1);
indices[index++] = pos;
indices[index] = pos + 1;
}
}
private void makePartialCylinder(
DrawContext dc,
double radius,
double[] altitudes,
boolean[] terrainConformant,
int slices,
int stacks,
int orientation,
double start,
double sweep,
Vec4 referenceCenter,
Geometry dest) {
GeometryBuilder gb = this.getGeometryBuilder();
gb.setOrientation(orientation);
float height = (float) (altitudes[1] - altitudes[0]);
int count = gb.getPartialCylinderVertexCount(slices, stacks);
int numCoords = 3 * count;
float[] verts = new float[numCoords];
float[] norms = new float[numCoords];
gb.makePartialCylinderVertices(
(float) radius, height, slices, stacks, (float) start, (float) sweep, verts);
gb.makePartialCylinderNormals(
(float) radius, height, slices, stacks, (float) start, (float) sweep, norms);
this.makePartialCylinderTerrainConformant(
dc, slices, stacks, verts, altitudes, terrainConformant, referenceCenter);
dest.setVertexData(count, verts);
dest.setNormalData(count, norms);
}
protected void makeTessellatedLocations(
Globe globe, int subdivisions, List<LatLon> locations, List<LatLon> tessellatedLocations) {
ArrayList<Vec4> points = new ArrayList<Vec4>();
for (LatLon ll : locations) {
points.add(globe.computePointFromLocation(ll));
}
//noinspection StringEquality
if (WWMath.computeWindingOrderOfLocations(locations) != AVKey.COUNTER_CLOCKWISE)
Collections.reverse(locations);
Vec4 centerPoint = Vec4.computeAveragePoint(points);
Vec4 surfaceNormal = globe.computeSurfaceNormalAtPoint(centerPoint);
int numPoints = points.size();
float[] coords = new float[3 * numPoints];
for (int i = 0; i < numPoints; i++) {
points.get(i).toFloatArray(coords, 3 * i, 3);
}
GeometryBuilder gb = new GeometryBuilder();
GeometryBuilder.IndexedTriangleArray tessellatedPoints =
gb.tessellatePolygon(0, numPoints, coords, surfaceNormal);
for (int i = 0; i < subdivisions; i++) {
gb.subdivideIndexedTriangleArray(tessellatedPoints);
}
for (int i = 0; i < tessellatedPoints.getVertexCount(); i++) {
Vec4 v = Vec4.fromFloatArray(tessellatedPoints.getVertices(), 3 * i, 3);
tessellatedLocations.add(globe.computePositionFromPoint(v));
}
}
private int getSectionOutlineIndexCount(
int subdivisions, boolean beginEdgeFlag, boolean endEdgeFlag) {
GeometryBuilder gb = this.getGeometryBuilder();
int count = 4 * (gb.getSubdivisionPointsVertexCount(subdivisions) - 1);
if (beginEdgeFlag) count += 2;
if (endEdgeFlag) count += 2;
return count;
}
private void makeEdge(
DrawContext dc,
int count,
float[] locations,
Boolean[] edgeFlags,
double[] altitudes,
boolean[] terrainConformant,
int subdivisions,
int orientation,
Matrix locationTransform,
Vec4 referenceCenter,
int fillIndexPos,
int[] fillIndices,
int outlineIndexPos,
int[] outlineIndices,
int vertexPos,
float[] vertices,
float[] normals) {
GeometryBuilder gb = this.getGeometryBuilder();
gb.setOrientation(orientation);
int sectionFillIndexCount = this.getSectionFillIndexCount(subdivisions);
int sectionVertexCount = this.getSectionVertexCount(subdivisions);
for (int i = 0; i < count - 1; i++) {
boolean beginEdgeFlag = edgeFlags[i];
boolean endEdgeFlag = edgeFlags[i + 1];
this.makeSectionFillIndices(subdivisions, vertexPos, fillIndexPos, fillIndices);
this.makeSectionOutlineIndices(
subdivisions, vertexPos, outlineIndexPos, outlineIndices, beginEdgeFlag, endEdgeFlag);
this.makeSectionVertices(
dc,
i,
locations,
altitudes,
terrainConformant,
subdivisions,
locationTransform,
referenceCenter,
vertexPos,
vertices);
gb.makeIndexedTriangleArrayNormals(
fillIndexPos,
sectionFillIndexCount,
fillIndices,
vertexPos,
sectionVertexCount,
vertices,
normals);
fillIndexPos += sectionFillIndexCount;
outlineIndexPos += this.getSectionOutlineIndexCount(subdivisions, beginEdgeFlag, endEdgeFlag);
vertexPos += sectionVertexCount;
}
}
private void makeRadialWallIndices(int pillars, int stacks, int orientation, Geometry dest) {
GeometryBuilder gb = this.getGeometryBuilder();
gb.setOrientation(orientation);
int mode = gb.getRadialWallDrawMode();
int count = gb.getRadialWallIndexCount(pillars, stacks);
int[] indices = new int[count];
gb.makeRadialWallIndices(pillars, stacks, indices);
dest.setElementData(mode, count, indices);
}
private void makePartialDiskIndices(int slices, int loops, int orientation, Geometry dest) {
GeometryBuilder gb = this.getGeometryBuilder();
gb.setOrientation(orientation);
int mode = gb.getPartialDiskDrawMode();
int count = gb.getPartialDiskIndexCount(slices, loops);
int[] indices = new int[count];
gb.makePartialDiskIndices(slices, loops, indices);
dest.setElementData(mode, count, indices);
}
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);
}
}
}
private void makeSectionFillIndices(
int subdivisions, int vertexPos, int indexPos, int[] indices) {
GeometryBuilder gb = this.getGeometryBuilder();
int count = gb.getSubdivisionPointsVertexCount(subdivisions);
int index = indexPos;
int pos, nextPos;
for (int i = 0; i < count - 1; i++) {
pos = vertexPos + 2 * i;
nextPos = vertexPos + 2 * (i + 1);
indices[index++] = pos + 1;
indices[index++] = pos;
indices[index++] = nextPos + 1;
indices[index++] = nextPos + 1;
indices[index++] = pos;
indices[index++] = nextPos;
}
}
private void makePartialDisk(
DrawContext dc,
double[] radii,
double altitude,
boolean terrainConformant,
int slices,
int loops,
int orientation,
double start,
double sweep,
Vec4 referenceCenter,
Geometry dest) {
GeometryBuilder gb = this.getGeometryBuilder();
gb.setOrientation(orientation);
int count = gb.getPartialDiskIndexCount(slices, loops);
int numCoords = 3 * count;
float[] verts = new float[numCoords];
float[] norms = new float[numCoords];
gb.makePartialDiskVertices(
(float) radii[0], (float) radii[1], slices, loops, (float) start, (float) sweep, verts);
this.makePartialDiskTerrainConformant(
dc, numCoords, verts, altitude, terrainConformant, referenceCenter);
gb.makePartialDiskVertexNormals(
(float) radii[0],
(float) radii[1],
slices,
loops,
(float) start,
(float) sweep,
verts,
norms);
dest.setVertexData(count, verts);
dest.setNormalData(count, norms);
}
private int getSectionVertexCount(int subdivisions) {
GeometryBuilder gb = this.getGeometryBuilder();
return 2 * gb.getSubdivisionPointsVertexCount(subdivisions);
}
private int getSectionFillIndexCount(int subdivisions) {
GeometryBuilder gb = this.getGeometryBuilder();
return 6 * (gb.getSubdivisionPointsVertexCount(subdivisions) - 1);
}
private void makePolygon(
DrawContext dc,
List<LatLon> locations,
List<Boolean> edgeFlags,
double[] altitudes,
boolean[] terrainConformant,
boolean enableCaps,
int subdivisions,
Vec4 referenceCenter,
PolygonGeometry dest) {
if (locations.size() == 0) return;
GeometryBuilder gb = this.getGeometryBuilder();
Vec4[] polyPoints = new Vec4[locations.size() + 1];
Boolean[] polyEdgeFlags = new Boolean[locations.size() + 1];
Matrix[] polyTransform = new Matrix[1];
int polyCount =
this.computeCartesianPolygon(
dc.getGlobe(), locations, edgeFlags, polyPoints, polyEdgeFlags, polyTransform);
// Compute the winding order of the planar cartesian points. If the order is not
// counter-clockwise, then
// reverse the locations and points ordering.
int winding = gb.computePolygonWindingOrder2(0, polyCount, polyPoints);
if (winding != GeometryBuilder.COUNTER_CLOCKWISE) {
gb.reversePoints(0, polyCount, polyPoints);
gb.reversePoints(0, polyCount, polyEdgeFlags);
}
float[] polyVertices = new float[3 * polyCount];
this.makePolygonVertices(polyCount, polyPoints, polyVertices);
int fillDrawMode = GL.GL_TRIANGLES;
int outlineDrawMode = GL.GL_LINES;
int fillIndexCount = 0;
int outlineIndexCount = 0;
int vertexCount = 0;
GeometryBuilder.IndexedTriangleArray ita = null;
fillIndexCount += this.getEdgeFillIndexCount(polyCount, subdivisions);
outlineIndexCount += this.getEdgeOutlineIndexCount(polyCount, subdivisions, polyEdgeFlags);
vertexCount += this.getEdgeVertexCount(polyCount, subdivisions);
if (enableCaps) {
ita = gb.tessellatePolygon2(0, polyCount, polyVertices);
for (int i = 0; i < subdivisions; i++) {
gb.subdivideIndexedTriangleArray(ita);
}
fillIndexCount += ita.getIndexCount();
vertexCount += ita.getVertexCount();
// Bottom cap isn't drawn if airspace is collapsed.
if (!this.isAirspaceCollapsed()) {
fillIndexCount += ita.getIndexCount();
vertexCount += ita.getVertexCount();
}
}
int[] fillIndices = new int[fillIndexCount];
int[] outlineIndices = new int[outlineIndexCount];
float[] vertices = new float[3 * vertexCount];
float[] normals = new float[3 * vertexCount];
int fillIndexPos = 0;
int outlineIndexPos = 0;
int vertexPos = 0;
this.makeEdge(
dc,
polyCount,
polyVertices,
polyEdgeFlags,
altitudes,
terrainConformant,
subdivisions,
GeometryBuilder.OUTSIDE,
polyTransform[0],
referenceCenter,
fillIndexPos,
fillIndices,
outlineIndexPos,
outlineIndices,
vertexPos,
vertices,
normals);
fillIndexPos += this.getEdgeFillIndexCount(polyCount, subdivisions);
outlineIndexPos += this.getEdgeOutlineIndexCount(polyCount, subdivisions, polyEdgeFlags);
vertexPos += this.getEdgeVertexCount(polyCount, subdivisions);
if (enableCaps) {
this.makeCap(
dc,
ita,
altitudes[1],
terrainConformant[1],
GeometryBuilder.OUTSIDE,
polyTransform[0],
referenceCenter,
fillIndexPos,
fillIndices,
vertexPos,
vertices,
normals);
fillIndexPos += ita.getIndexCount();
vertexPos += ita.getVertexCount();
// Bottom cap isn't drawn if airspace is collapsed.
if (!this.isAirspaceCollapsed()) {
this.makeCap(
dc,
ita,
altitudes[0],
terrainConformant[0],
GeometryBuilder.INSIDE,
polyTransform[0],
referenceCenter,
fillIndexPos,
fillIndices,
vertexPos,
vertices,
normals);
fillIndexPos += ita.getIndexCount();
vertexPos += ita.getVertexCount();
}
}
dest.getFillIndexGeometry().setElementData(fillDrawMode, fillIndexCount, fillIndices);
dest.getOutlineIndexGeometry()
.setElementData(outlineDrawMode, outlineIndexCount, outlineIndices);
dest.getVertexGeometry().setVertexData(vertexCount, vertices);
dest.getVertexGeometry().setNormalData(vertexCount, normals);
}