diff options
| author | Clément Foucault <foucault.clem@gmail.com> | 2018-02-14 19:55:01 +0300 |
|---|---|---|
| committer | Clément Foucault <foucault.clem@gmail.com> | 2018-02-14 20:59:42 +0300 |
| commit | 1e9ef2a25e08462a020de3897bc3b68a782c4120 (patch) | |
| tree | 7e567242b21a874008398e1c2b9d0e684b9195da /intern/gawain | |
| parent | 0f3bc636c828bcbaa79952375d86a222f4873ecb (diff) | |
GWN: Add GWN_batch_draw_procedural
This allow to drawn large amounts of primitives without any memory footprint.
Diffstat (limited to 'intern/gawain')
| -rw-r--r-- | intern/gawain/gawain/gwn_batch.h | 4 | ||||
| -rw-r--r-- | intern/gawain/src/gwn_batch.c | 15 |
2 files changed, 16 insertions, 3 deletions
diff --git a/intern/gawain/gawain/gwn_batch.h b/intern/gawain/gawain/gwn_batch.h index 9564d8cd587..94cd893f09e 100644 --- a/intern/gawain/gawain/gwn_batch.h +++ b/intern/gawain/gawain/gwn_batch.h @@ -85,11 +85,9 @@ void GWN_batch_uniform_4fv(Gwn_Batch*, const char* name, const float data[4]); void GWN_batch_draw(Gwn_Batch*); -// clement : temp stuff void GWN_batch_draw_stupid(Gwn_Batch*, int v_first, int v_count); void GWN_batch_draw_stupid_instanced(Gwn_Batch*, Gwn_Batch*, int instance_first, int instance_count); - - +void GWN_batch_draw_procedural(Gwn_Batch*, Gwn_PrimType, int v_count); #if 0 // future plans diff --git a/intern/gawain/src/gwn_batch.c b/intern/gawain/src/gwn_batch.c index 9cd5400f144..ec3f98e348c 100644 --- a/intern/gawain/src/gwn_batch.c +++ b/intern/gawain/src/gwn_batch.c @@ -417,3 +417,18 @@ void GWN_batch_draw_stupid_instanced(Gwn_Batch* batch_instanced, Gwn_Batch* batc glBindVertexArray(0); } + +// just draw some vertices and let shader place them where we want. +void GWN_batch_draw_procedural(Gwn_Batch* batch, Gwn_PrimType prim_type, int v_count) + { + // we cannot draw without vao ... annoying ... + if (batch->vao_id) + glBindVertexArray(batch->vao_id); + else + Batch_prime(batch); + + GLenum type = convert_prim_type_to_gl(prim_type); + glDrawArrays(type, 0, v_count); + + glBindVertexArray(0); + } |