Dynamic Mesh From Data

If you want to create your own dynamic mesh with your own data we can use a Dynamic Buffer Mesh. It requires information about the vertex position stored in a vertex buffer. For that we can use a DynamicBuffer node and set IsVertexBuffer to true. To see the parameter you need right click node and configure and activate IsVertexBuffer. For random position data we use RandomSpread(3D) and generate normals from it with GenerateNormals. In a ForEach we combine the position data and the normal data in a Create(VertexPos3Norm3Tex2) node.

To define how the single vertices get connected to full triangles we create an index buffer. For that we use another Dynamic Buffer, activate IsIndexBuffer in the configure menu and after that count the amount of elements in our data source here - RandomSpread and create with I an indexed spread. This gives us values from 0,1,2,3... till the amount of counted entries. You can randomize it with a Randomizer after the I. To get the lighting right you would need to pass the randomized indices into the GenerateNormals.

To affect how many vertex of our mesh actually get drawn we can use DynamicDrawArgsBuffer as Draw Args input of the DynamicBufferMesh. With StartIndexLocation we can define which part we want to draw and with IndecesCount we define how many vertices we want to draw.