diff options
author | Jeroen Bakker <jbakker> | 2021-09-24 08:42:36 +0300 |
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committer | Jeroen Bakker <jeroen@blender.org> | 2021-09-24 08:44:22 +0300 |
commit | 6a88f83d679f281d7adb3798ab4770069a63c2da (patch) | |
tree | 02b6e3870e7651c40c63eb23285e7f2ff3f2507e /source/blender/draw/intern/draw_cache_impl_hair.c | |
parent | 0f764ade1a2fd8aa9c462dd5850e8be52aa203f5 (diff) |
Hair Info Length Attribute
Goal is to add the length attribute to the Hair Info node, for better control over color gradients or similar along the hair.
Reviewed By: #eevee_viewport, brecht
Differential Revision: https://developer.blender.org/D10481
Diffstat (limited to 'source/blender/draw/intern/draw_cache_impl_hair.c')
-rw-r--r-- | source/blender/draw/intern/draw_cache_impl_hair.c | 59 |
1 files changed, 42 insertions, 17 deletions
diff --git a/source/blender/draw/intern/draw_cache_impl_hair.c b/source/blender/draw/intern/draw_cache_impl_hair.c index 6424b21666d..82af32c4c9f 100644 --- a/source/blender/draw/intern/draw_cache_impl_hair.c +++ b/source/blender/draw/intern/draw_cache_impl_hair.c @@ -30,6 +30,7 @@ #include "BLI_math_base.h" #include "BLI_math_vector.h" #include "BLI_utildefines.h" +#include "BLI_listbase.h" #include "DNA_hair_types.h" #include "DNA_object_types.h" @@ -38,6 +39,7 @@ #include "GPU_batch.h" #include "GPU_texture.h" +#include "GPU_material.h" #include "draw_cache_impl.h" /* own include */ #include "draw_hair_private.h" /* own include */ @@ -141,7 +143,7 @@ static void ensure_seg_pt_count(Hair *hair, ParticleHairCache *hair_cache) } } -static void hair_batch_cache_fill_segments_proc_pos(Hair *hair, GPUVertBufRaw *attr_step) +static void hair_batch_cache_fill_segments_proc_pos(Hair *hair, GPUVertBufRaw *attr_step, GPUVertBufRaw *length_step) { /* TODO: use hair radius layer if available. */ HairCurve *curve = hair->curves; @@ -162,6 +164,8 @@ static void hair_batch_cache_fill_segments_proc_pos(Hair *hair, GPUVertBufRaw *a seg_data[3] = total_len; co_prev = curve_co[j]; } + /* Assign length value*/ + *(float *)GPU_vertbuf_raw_step(length_step) = total_len; if (total_len > 0.0f) { /* Divide by total length to have a [0-1] number. */ for (int j = 0; j < curve->numpoints; j++, seg_data_first += 4) { @@ -171,28 +175,48 @@ static void hair_batch_cache_fill_segments_proc_pos(Hair *hair, GPUVertBufRaw *a } } -static void hair_batch_cache_ensure_procedural_pos(Hair *hair, ParticleHairCache *cache) +static void hair_batch_cache_ensure_procedural_pos(Hair *hair, + ParticleHairCache *cache, + GPUMaterial *gpu_material) { - if (cache->proc_point_buf != NULL) { - return; - } + if (cache->proc_point_buf == NULL) { + /* initialize vertex format */ + GPUVertFormat format = {0}; + uint pos_id = GPU_vertformat_attr_add(&format, "posTime", GPU_COMP_F32, 4, GPU_FETCH_FLOAT); - /* initialize vertex format */ - GPUVertFormat format = {0}; - uint pos_id = GPU_vertformat_attr_add(&format, "posTime", GPU_COMP_F32, 4, GPU_FETCH_FLOAT); + cache->proc_point_buf = GPU_vertbuf_create_with_format(&format); + GPU_vertbuf_data_alloc(cache->proc_point_buf, cache->point_len); - cache->proc_point_buf = GPU_vertbuf_create_with_format(&format); - GPU_vertbuf_data_alloc(cache->proc_point_buf, cache->point_len); + GPUVertBufRaw point_step; + GPU_vertbuf_attr_get_raw_data(cache->proc_point_buf, pos_id, &point_step); - GPUVertBufRaw pos_step; - GPU_vertbuf_attr_get_raw_data(cache->proc_point_buf, pos_id, &pos_step); + GPUVertFormat length_format = {0}; + uint length_id = GPU_vertformat_attr_add( + &length_format, "hairLength", GPU_COMP_F32, 1, GPU_FETCH_FLOAT); - hair_batch_cache_fill_segments_proc_pos(hair, &pos_step); + cache->proc_length_buf = GPU_vertbuf_create_with_format(&length_format); + GPU_vertbuf_data_alloc(cache->proc_length_buf, cache->strands_len); - /* Create vbo immediately to bind to texture buffer. */ - GPU_vertbuf_use(cache->proc_point_buf); + GPUVertBufRaw length_step; + GPU_vertbuf_attr_get_raw_data(cache->proc_length_buf, length_id, &length_step); + + hair_batch_cache_fill_segments_proc_pos(hair, &point_step, &length_step); - cache->point_tex = GPU_texture_create_from_vertbuf("hair_point", cache->proc_point_buf); + /* Create vbo immediately to bind to texture buffer. */ + GPU_vertbuf_use(cache->proc_point_buf); + cache->point_tex = GPU_texture_create_from_vertbuf("hair_point", cache->proc_point_buf); + } + + if (gpu_material && cache->proc_length_buf != NULL && cache->length_tex) { + ListBase gpu_attrs = GPU_material_attributes(gpu_material); + LISTBASE_FOREACH (GPUMaterialAttribute *, attr, &gpu_attrs) { + if (attr->type == CD_HAIRLENGTH) { + GPU_vertbuf_use(cache->proc_length_buf); + cache->length_tex = GPU_texture_create_from_vertbuf("hair_length", cache->proc_length_buf); + break; + } + } + } } static void hair_batch_cache_fill_strands_data(Hair *hair, @@ -310,6 +334,7 @@ static void hair_batch_cache_ensure_procedural_indices(Hair *hair, /* Ensure all textures and buffers needed for GPU accelerated drawing. */ bool hair_ensure_procedural_data(Object *object, ParticleHairCache **r_hair_cache, + GPUMaterial *gpu_material, int subdiv, int thickness_res) { @@ -325,7 +350,7 @@ bool hair_ensure_procedural_data(Object *object, /* Refreshed on combing and simulation. */ if ((*r_hair_cache)->proc_point_buf == NULL) { ensure_seg_pt_count(hair, &cache->hair); - hair_batch_cache_ensure_procedural_pos(hair, &cache->hair); + hair_batch_cache_ensure_procedural_pos(hair, &cache->hair, gpu_material); need_ft_update = true; } |