/// <summary>
/// Configure the CSG Expression of a vertical constraint (including 'shadow').
/// </summary>
private void configureVerticalConstraintExpression(vec3 refPos, Drone first, Drone second, CsgExpression expr)
{
// Calculate primary plane.
vec3 start = first.CurrentPosition;
vec3 end = second.CurrentPosition;
vec3 mid = (start + end) / 2f;
vec3 up = new vec3(0, 1, 0);
vec3 dir = end - start;
vec3 normal = vec3.cross(dir, up);
vec3 d = refPos - mid;
bool invert = vec3.dot(d, normal) < 0;
if (invert)
{
normal *= -1f;
}
expr.SetParameterVec3("plane1Normal", normal);
expr.SetParameterFloat("plane1Dis", vec3.dot(normal, mid));
// Caluclate first shadow plane
vec3 s1Pos = start;
vec3 s1Normal = vec3.cross(up, s1Pos - refPos);
if (invert)
{
s1Normal *= -1f;
}
expr.SetParameterVec3("plane2Normal", s1Normal);
expr.SetParameterFloat("plane2Dis", vec3.dot(s1Normal, s1Pos));
// Caluclate second shadow plane
vec3 s2Pos = end;
vec3 s2Normal = vec3.cross(s2Pos - refPos, up);
if (invert)
{
s2Normal *= -1f;
}
expr.SetParameterVec3("plane3Normal", s2Normal);
expr.SetParameterFloat("plane3Dis", vec3.dot(s2Normal, s2Pos));
}
public void DigCylinder(vec3 worldNormal, vec3 position, float radius, IEnumerable <int> filterMaterials, int terrainMaterialId = 1, DigMode digMode = DigMode.Substract)
{
cylinderNode.MaterialIndex = terrainMaterialId;
cylinderNode.SetParameterFloat("digRadius", radius);
cylinderNode.SetParameterVec3("digPosition", position);
vec3 dx, dy, dz;
player.AlignmentSystem(worldNormal, out dx, out dy, out dz);
cylinderNode.SetParameterVec3("digDirX", dx);
cylinderNode.SetParameterVec3("digDirY", dy);
cylinderNode.SetParameterVec3("digDirZ", dz);
Dig(cylinderNode, new BoundingSphere(position, radius * 1.5f), digMode, filterMaterials);
}
public void Dig(CsgNode shape, BoundingSphere shapeBoundary, DigMode digMode, IEnumerable <int> materialFilter)
{
CsgNode digShape = null;
// constraintDiffNode performs the constraint as a CSG operation
// by cutting away anything of thge digging shape not inside the allowed area.
CsgOpDiff constraintDiffNode = new CsgOpDiff();
// Assemble difference operation by applying all drone constraints.
player.AddDroneConstraints(constraintDiffNode, shapeBoundary.Center);
// When placing material, add a safety margin around the player to prevent it from physically glitching trough the terrain
if (digMode == DigMode.Add)
{
playerNode.SetParameterFloat("playerRadius", player.Character.CharacterDiameter * 0.5f + 0.2f);
playerNode.SetParameterVec3("playerPosition", player.Character.Position);
playerNode.SetParameterVec3("digDirX", new vec3(1, 0, 0));
playerNode.SetParameterVec3("digDirZ", new vec3(0, 0, 1));
playerNode.SetParameterVec3("digDirY", new vec3(0, 0, player.Character.BodyHeight * 0.5f + 0.2f));
constraintDiffNode.AddNode(playerNode);
}
// We apply the constraint by substracting it from the given shape.
CsgOpConcat constraintedShape = new CsgOpConcat();
constraintedShape.AddNode(shape);
constraintedShape.AddNode(constraintDiffNode);
digShape = constraintedShape;
CsgNode digNode = null;
// Depending on the digging mode, we either add or substract the digging shape from the terrain.
if (digMode == DigMode.Substract)
{
digNode = new CsgOpDiff(digShape);
}
else
{
digNode = new CsgOpUnion(digShape);
}
// Filter for tools
CsgNode filterNode = digNode;
if (materialFilter != null)
{
CsgFilterNode filter = new CsgFilterNode(true, digNode);
foreach (int mat in materialFilter)
{
filter.AddMaterial(mat);
}
filter.AddMaterial(0); // Air must be white-listed, too!
filterNode = filter;
}
// Float elimination
CsgOpConcat collapser = new CsgOpConcat(filterNode);
collapser.AddNode(new CsgCollapseNode());
// Callback for statistical purposes.
CsgStatCallback finalNode = new CsgStatCallback(collapser, 4, 4);
finalNode.AddSimpleVolumeCallback("UpvoidMiner", UpvoidMiner.ModDomain, "UpvoidMiner.DiggingController", "StatCallback");
finalNode.AddVolumeChangePointCallback("UpvoidMiner", UpvoidMiner.ModDomain, "UpvoidMiner.DiggingController", "PointCallback");
world.Terrain.ModifyTerrain(shapeBoundary, finalNode);
}