private static VertexArray MeshInstances(MyCameraShaderProgram shaderProgram)
{
var mesh = MeshTools.LoadFromResource("content.suzanne.obj");
var vertexArray = new VertexArray(PrimitiveType.Triangles);
vertexArray.AddIndices(mesh.ID.ToArray());
const int count = 100;
var rnd = new Random();
float RndRange(float min, float max) => min + (max - min) * (float)rnd.NextDouble();
var position = new Vector3[count];
for (int i = 0; i < count; ++i)
{
position[i] = new Vector3(RndRange(-8f, 8f), RndRange(-.5f, .5f), RndRange(-40f, -0f));
}
vertexArray.AddAttribute(shaderProgram.LocationInstancePosition, position, 3, VertexAttribPointerType.Float, true);
vertexArray.AddAttribute(shaderProgram.LocationPosition, mesh.Position.ToArray(), 3, VertexAttribPointerType.Float);
if (mesh.Normal.Count > 0 && -1 != shaderProgram.LocationNormal)
{
vertexArray.AddAttribute(shaderProgram.LocationNormal, mesh.Normal.ToArray(), 3, VertexAttribPointerType.Float);
}
if (mesh.TextureCoordinate.Count > 0 && -1 != shaderProgram.LocationTexCoord)
{
vertexArray.AddAttribute(shaderProgram.LocationTexCoord, mesh.TextureCoordinate.ToArray(), 2, VertexAttribPointerType.Float);
}
return(vertexArray);
}
public Scene()
{
shaderProgram = new MyCameraShaderProgram();
axis = CoordinateSystemAxis();
vertexArray = MeshInstances(shaderProgram);
}
