Implement segmented ridges with flexible positioning

Contribution_1/Polygon3D.jl

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+# This script creates 3D polygons from "x" and "y" coordinates, and allows you to define a depth range for the polygon.
+# It assigns phase and temperature values to the grid within the polygon.
+
+using GeophysicalModelGenerator     
+using CSV 
+using DataFrames  
+
+# Grid parameters
+nx, ny, nz = 512, 512, 128
+x = range(-1000, 1000, length=nx)
+y = range(-1000, 1000, length=ny)
+z = range(-660, 0, length=nz)
+Grid = CartData(xyz_grid(x, y, z))
+
+# Phases and temperature
+Phases = fill(2, nx, ny, nz)
+Temp = fill(1350.0, nx, ny, nz)
+
+# Set the desired depth range for the polygon
+z_lower_limit = -80.0
+z_upper_limit = 0.0
+
+# Define phase and temperature values for the polygon
+phase_poly = 5
+temp_poly = 1000.0
+
+# Read polygon using CSV and DataFrame
+polygon_file = "Test_block.txt"
+df = CSV.read(polygon_file, DataFrame, delim=' ')  # Read CSV file with a space as delimiter
+xpoly, ypoly = df[:, 1], df[:, 2]  # Extract coordinates
+
+# Function to verify if a point (px, py) is inside a polygon defined by the coordinates (poly_x, poly_y)
+function point_in_polygon(px, py, poly_x, poly_y)
+    n = length(poly_x)
+    inside = false
+    j = n
+    for i in 1:n
+        if ((poly_y[i] > py) != (poly_y[j] > py)) && 
+           (px < (poly_x[j] - poly_x[i]) * (py - poly_y[i]) / (poly_y[j] - poly_y[i]) + poly_x[i])
+            inside = !inside
+        end
+        j = i
+    end
+    return inside
+end
+
+# Assign phase and temperature for the polygon within a specific depth range
+function assign_polygon_properties!(Phases, Temp, x, y, z, xpoly, ypoly, phase_value, temp_value, z_lower_limit, z_upper_limit)
+    for ix in 1:length(x), iy in 1:length(y), iz in 1:length(z)
+        px, py, pz = x[ix], y[iy], z[iz]
+
+        # Check if the point is inside the polygon (in 2D projection) and within the z-range
+        if point_in_polygon(px, py, xpoly, ypoly) && pz >= z_lower_limit && pz <= z_upper_limit
+            Phases[ix, iy, iz] = phase_value
+            Temp[ix, iy, iz] = temp_value
+        end
+    end
+end
+
+# Assign properties within the specified depth range
+assign_polygon_properties!(Phases, Temp, x, y, z, xpoly, ypoly, phase_poly, temp_poly, z_lower_limit, z_upper_limit)
+
+# Add and save results
+Grid = addfield(Grid, (; Phases, Temp))
+write_paraview(Grid, "Polygon3D")
+
+

Contribution_1/Test_block.txt

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+-750 -400
+-1000 0
+-750 400
+-250 400
+0 0
+-250 -400
+-750 -400