koobas.hobune.stream
How can I generate a up facing quad mesh with adjustable res?
Hello! I am making a little oceanic game, and right now, I am working on making a ocean floor. I have gotten quite far, I have a compute shader, that can be inputed some vertices and output a new list of vertices with differing heights. Snipped from compute shader:
[numthreads(8,1,1)]
void CSMain (uint3 id : SV_DispatchThreadID)
{
// Get current vertex position
float3 position = vertices[id.x];
// Because vertices are local, just add centre position of parent "SeaFloorChunk"
position += worldSpaceVertexOffset;
vertices[id.x].y = snoise(position / terrainSmoothness) * heightMagnitude;
}
Right now, I am using this code to generate a plane mesh (vertices and triangles) to input to the compute shader to edit.
public float _size;
public int resolution;
void Generate()
{
System.DateTime startingTime = System.DateTime.Now;
vertices = new Vector3[(resolution + 1) * (resolution + 1)];
float stepSize = _size / resolution;
int index = 0;
for(float x = 0; x <= resolution; x ++)
{
for(float z = 0; z <= resolution; z ++)
{
Vector3 position = new Vector3(
x * stepSize,
1,
z * stepSize
);
vertices[index] = position;
index ++;
}
}
int t = 0;
int v = 0;
triangles = new int[resolution * resolution * 6];
for(int y = 0; y < resolution; y++) {
for(int x = 0; x < resolution; x++) {
triangles[t] = v;
triangles[t + 1] = v + resolution + 1;
triangles[t + 2] = v + 1;
triangles[t + 3] = v + 1;
triangles[t + 4] = v + resolution + 1;
triangles[t + 5] = v + resolution + 2;
t += 6;
v ++;
}
v ++;
}
planeMesh = new BaseMeshData();
planeMesh.vertices = vertices;
planeMesh.triangles = triangles;
System.TimeSpan duration = System.DateTime.Now.Subtract(startingTime);
Debug.Log($"Took {((float) duration.Milliseconds) / 1000} seconds to generate plane.");
}
With some other code, this is the output:
It is sorta smooth, but you might notice two things. First, the two strips of chunks are separated, when in theory all chunks are separated by a _size of 32. Number Two, you might also notice some strips poking out of the terrain. I don't know what it is, but I think it is some weird bug with the triangles in my Generating a plane function.
I was wondering if someone could help me construct a better method (That works) of generating a base plane, with a given resolution, resolution meaning higher the resolution, higher the amount of vertices on the plane.
Thank you so much!
