bgfx/examples/40-svt/fs_vt_mip.sc

19 lines
516 B
Scala

$input v_texcoord0
/*
* Copyright 2011-2018 Branimir Karadzic. All rights reserved.
* License: https://github.com/bkaradzic/bgfx#license-bsd-2-clause
*/
#include "../common/common.sh"
#include "virtualtexture.sh"
void main()
{
float mipCount = log2(PageTableSize);
float mip = floor(MipLevel(v_texcoord0.xy, VirtualTextureSize) - MipBias);
mip = clamp(mip, 0, mipCount);
vec2 offset = floor(v_texcoord0.xy * PageTableSize);
gl_FragColor = vec4(floor(vec3(offset / exp2(mip), mip)) / 255.0, 1.0);
}