Hello everyone,
It has been some time since I have been on gamedev and programming in D3D. In the last month or so I have been working on a voxel terrain of 512x512x256 placed within a home brewed octree. I'm currently using D3D11 with instancing and batch based on textures. I discovered that I could bind multiple textures into a texture array. I attempted to pass an unsigned int as a texture index value along with my instance data, but I hit a wall trying to receive that uint in the pixel shader as it will not compile. I have read that the pixel shader does not take uint as input. However, the compile error is X3512: sampler array index must be a literal expression. Which I figure that the array index must be known during compile time.
Either way, I ask:
Is it possible to pass an index to a texture array through instancing?
PS code:
Texture2D texture_data[2];
SamplerState sample_state;
struct PS_INPUT
{
float4 position : SV_POSITION;
float4 normal : NORMAL;
float2 uv : TEXCOORD0;
uint instance_texture : TEXCOORD1;
};
float4 main(PS_INPUT input) : SV_TARGET
{
float4 light = { 0.707f, -0.707f, 0.0f, 0.0f }; // In World Space //0 = Vector : 1 = Point
light = normalize(-light);
float4 texture_color = texture_data[input.instance_texture].Sample(sample_state, input.uv);
float ambient_scalar = 0.5f;
float4 ambient_color = ambient_scalar * texture_color;
float light_scalar = dot(light, input.normal);
float4 light_color = light_scalar * texture_color;
if (light_scalar > 0.0f)
return saturate(ambient_color + light_color);
else
return saturate(ambient_color);
}
