diff options
Diffstat (limited to '3rdparty/bgfx/examples/41-tess/vs_terrain_render.sc')
-rw-r--r-- | 3rdparty/bgfx/examples/41-tess/vs_terrain_render.sc | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/3rdparty/bgfx/examples/41-tess/vs_terrain_render.sc b/3rdparty/bgfx/examples/41-tess/vs_terrain_render.sc new file mode 100644 index 00000000000..a0538f9a983 --- /dev/null +++ b/3rdparty/bgfx/examples/41-tess/vs_terrain_render.sc @@ -0,0 +1,39 @@ +$input a_texcoord0 +$output v_texcoord0 + +#include "terrain_common.sh" + +BUFFER_RO(u_CulledSubdBuffer, uint, 2); +BUFFER_RO(u_VertexBuffer, vec4, 3); +BUFFER_RO(u_IndexBuffer, uint, 4); + +void main() +{ + // get threadID (each key is associated to a thread) + int threadID = gl_InstanceID; + + // get coarse triangle associated to the key + uint primID = u_CulledSubdBuffer[threadID*2]; + + vec4 v_in[3]; + + v_in[0] = u_VertexBuffer[u_IndexBuffer[primID * 3 ]]; + v_in[1] = u_VertexBuffer[u_IndexBuffer[primID * 3 + 1]]; + v_in[2] = u_VertexBuffer[u_IndexBuffer[primID * 3 + 2]]; + + // compute sub-triangle associated to the key + uint key = u_CulledSubdBuffer[threadID*2+1]; + + vec4 v[3]; + + subd(key, v_in, v); + + // compute vertex location + vec4 finalVertex = berp(v, a_texcoord0); + + finalVertex.z+= dmap(finalVertex.xy); + + v_texcoord0 = finalVertex.xy * 0.5 + 0.5; + + gl_Position = mul(u_modelViewProj, finalVertex); +} |