[unity] ShaderGraph realizes contour and elevation gradient coloring
The realization idea of the contour line
method one:
Obtain the height (y) value of the vertex through the Position node, remove the height value from the equal height distance and take the remainder, and set the output boundary (step) of the remainder
Method Two:
Subtract the rounding of the y value from the y value, multiply the difference and the difference, and set the output boundary (step)
The Idea of Elevation Gradient Coloring
simple assignment method
Use Gradient (gradient node) to directly assign values with y values
Although this method is convenient, the Gradient node cannot be opened, and the color cannot be dynamic
Difference Gradient Assignment Method
Taking three colors as an example, the core node used is Lerp, which maps the height of the terrain to 0-1, and the mapped value becomes the difference of the gradient
final overlay
overall arrangement
