public static String getJSON(FemCore model, double beta, double gamma) {
final double start = System.currentTimeMillis();
final int numberOfNodes = model.getNumberOfNodes();
final int numberOfElements = model.getNumberOfElements();
// Set new gravity forces
if (Math.abs(beta) >= 0.1 || Math.abs(gamma) >= 0.1) {
double xForce = 2000.0 * Math.sin(-beta / 180 * Math.PI) / numberOfNodes;
double yForce = 2000.0 * Math.sin(-gamma / 180 * Math.PI) / numberOfNodes;
final double[] newinputForces = new double[numberOfNodes * 2];
for (int nodeId = 1; nodeId <= numberOfNodes; nodeId++) {
if (!model.isNodeHorzontallyFixed(nodeId)) {
newinputForces[nodeId * 2 - 1] = xForce;
} else {
newinputForces[nodeId * 2 - 1] = 0.0;
}
if (!model.isNodeVerticallyFixed(nodeId)) {
newinputForces[nodeId * 2 - 2] = yForce;
} else {
newinputForces[nodeId * 2 - 2] = 0.0;
}
}
model.solveLinearEquations(newinputForces);
} else {
model.solveLinearEquations(null);
}
final HashMap<Integer, Boolean> nodeIds = new HashMap<Integer, Boolean>();
final StringBuilder pre = new StringBuilder("[");
for (int elementId = 1; elementId <= numberOfElements; elementId++) {
pre.append("[");
for (int cornerId = 1; cornerId < 4; cornerId++) {
final int nodeId = model.getNodeIdByElementId(elementId, cornerId);
pre.append("\n{\"id\": ")
.append(
nodeId //
)
.append(", \"x_force\" : ")
.append(
model.getSolutionNodeForceX(nodeId) //
)
.append(", \"y_force\" : ")
.append(
model.getSolutionNodeForceY(nodeId) //
)
.append(", \"x_d\" : ")
.append(
model.getSolutionNodeDisplacementX(nodeId) //
)
.append(", \"y_d\" : ")
.append(
model.getSolutionNodeDisplacementY(nodeId) //
)
.append(", \"x_fixed\" : ")
.append(
model.isNodeVerticallyFixed(nodeId) //
)
.append(", \"y_fixed\" : ")
.append(
model.isNodeHorzontallyFixed(nodeId) //
)
.append(", \"x\" : ")
.append(
model.getNodeIdByElementIdX(elementId, cornerId) //
)
.append(", \"y\" : ")
.append(
model.getNodeIdByElementIdY(elementId, cornerId) //
)
.append(", \"deltaArea\" : ")
.append(
model.getSolutionsDisplacementsMeanX(elementId) //
)
.append(" }\n");
if (cornerId <= 3) {
pre.append(',');
}
nodeIds.put(nodeId, true);
}
pre.append("]");
if (elementId < numberOfElements + 1) {
pre.append(',');
}
}
pre.append("]");
final double end = System.currentTimeMillis();
System.out.println("json created [" + (end - start) + "ms]");
return pre.toString();
}
