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Differential D5665 Diff 17783 source/blender/draw/intern/draw_cache_extract_mesh.c

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source/blender/draw/intern/draw_cache_extract_mesh.c

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/* ---------------------------------------------------------------------- */ /* ---------------------------------------------------------------------- */
/** \name Extract Edit UV area stretch /** \name Extract Edit UV area stretch
* \{ */ * \{ */
static void *extract_stretch_area_init(const MeshRenderData *mr, void *buf) static void *extract_stretch_area_init(const MeshRenderData *mr, void *buf)
{ {
static GPUVertFormat format = {0}; static GPUVertFormat format = {0};
if (format.attr_len == 0) { if (format.attr_len == 0) {
GPU_vertformat_attr_add(&format, "stretch", GPU_COMP_U16, 1, GPU_FETCH_INT_TO_FLOAT_UNIT); GPU_vertformat_attr_add(&format, "ratio", GPU_COMP_U16, 1, GPU_FETCH_INT_TO_FLOAT_UNIT);
} }
GPUVertBuf *vbo = buf; GPUVertBuf *vbo = buf;
GPU_vertbuf_init_with_format(vbo, &format); GPU_vertbuf_init_with_format(vbo, &format);
GPU_vertbuf_data_alloc(vbo, mr->loop_len); GPU_vertbuf_data_alloc(vbo, mr->loop_len);
return NULL; return NULL;
} }
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BLI_INLINE float area_ratio_to_stretch(float ratio, float tot_ratio, float inv_tot_ratio) BLI_INLINE float area_ratio_to_stretch(float ratio, float tot_ratio, float inv_tot_ratio)
{ {
ratio *= (ratio > 0.0f) ? tot_ratio : -inv_tot_ratio; ratio *= (ratio > 0.0f) ? tot_ratio : -inv_tot_ratio;
return (ratio > 1.0f) ? (1.0f / ratio) : ratio; return (ratio > 1.0f) ? (1.0f / ratio) : ratio;
} }
static void mesh_stretch_area_finish(const MeshRenderData *mr, void *buf, void *UNUSED(data)) static void mesh_stretch_area_finish(const MeshRenderData *mr, void *buf, void *UNUSED(data))
{ {
float totarea = 0, totuvarea = 0; float tot_area = 0.0f, tot_uv_area = 0.0f;
float *area_ratio = MEM_mallocN(sizeof(float) * mr->poly_len, __func__); float *area_ratio = MEM_mallocN(sizeof(float) * mr->poly_len, __func__);
if (mr->extract_type == MR_EXTRACT_BMESH) { if (mr->extract_type == MR_EXTRACT_BMESH) {
CustomData *cd_ldata = &mr->bm->ldata; CustomData *cd_ldata = &mr->bm->ldata;
int uv_ofs = CustomData_get_offset(cd_ldata, CD_MLOOPUV); int uv_ofs = CustomData_get_offset(cd_ldata, CD_MLOOPUV);
BMFace *efa; BMFace *efa;
BMIter f_iter; BMIter f_iter;
int f; int f;
BM_ITER_MESH_INDEX (efa, &f_iter, mr->bm, BM_FACES_OF_MESH, f) { BM_ITER_MESH_INDEX (efa, &f_iter, mr->bm, BM_FACES_OF_MESH, f) {
float area = BM_face_calc_area(efa); float area = BM_face_calc_area(efa);
float uvarea = BM_face_calc_area_uv(efa, uv_ofs); float uvarea = BM_face_calc_area_uv(efa, uv_ofs);
totarea += area; tot_area += area;
totuvarea += uvarea; tot_uv_area += uvarea;
area_ratio[f] = area_ratio_get(area, uvarea); area_ratio[f] = area_ratio_get(area, uvarea);
} }
} }
else if (mr->extract_type == MR_EXTRACT_MAPPED) { else if (mr->extract_type == MR_EXTRACT_MAPPED) {
const MLoopUV *uv_data = CustomData_get_layer(&mr->me->ldata, CD_MLOOPUV); const MLoopUV *uv_data = CustomData_get_layer(&mr->me->ldata, CD_MLOOPUV);
const MPoly *mpoly = mr->mpoly; const MPoly *mpoly = mr->mpoly;
for (int p = 0; p < mr->poly_len; p++, mpoly++) { for (int p = 0; p < mr->poly_len; p++, mpoly++) {
float area = BKE_mesh_calc_poly_area(mpoly, &mr->mloop[mpoly->loopstart], mr->mvert); float area = BKE_mesh_calc_poly_area(mpoly, &mr->mloop[mpoly->loopstart], mr->mvert);
float uvarea = BKE_mesh_calc_poly_uv_area(mpoly, uv_data); float uvarea = BKE_mesh_calc_poly_uv_area(mpoly, uv_data);
totarea += area; tot_area += area;
totuvarea += uvarea; tot_uv_area += uvarea;
area_ratio[p] = area_ratio_get(area, uvarea); area_ratio[p] = area_ratio_get(area, uvarea);
} }
} }
else { else {
/* Should not happen. */ /* Should not happen. */
BLI_assert(0); BLI_assert(0);
} }
float tot_ratio, inv_tot_ratio; mr->cache->tot_area = tot_area;
if (totarea < FLT_EPSILON || totuvarea < FLT_EPSILON) { mr->cache->tot_uv_area = tot_uv_area;
tot_ratio = 0.0f;
inv_tot_ratio = 0.0f;
}
else {
tot_ratio = totarea / totuvarea;
inv_tot_ratio = totuvarea / totarea;
}
/* Convert in place to avoid an extra allocation */ /* Convert in place to avoid an extra allocation */
uint16_t *poly_stretch = (uint16_t *)area_ratio; uint16_t *poly_stretch = (uint16_t *)area_ratio;
for (int p = 0; p < mr->poly_len; p++) { for (int p = 0; p < mr->poly_len; p++) {
float stretch = area_ratio_to_stretch(area_ratio[p], tot_ratio, inv_tot_ratio); poly_stretch[p] = area_ratio[p] * 65534.0f;
poly_stretch[p] = (1.0f - stretch) * 65534.0f;
} }
/* Copy face data for each loop. */ /* Copy face data for each loop. */
GPUVertBuf *vbo = buf; GPUVertBuf *vbo = buf;
uint16_t *loop_stretch = (uint16_t *)vbo->data; uint16_t *loop_stretch = (uint16_t *)vbo->data;
if (mr->extract_type == MR_EXTRACT_BMESH) { if (mr->extract_type == MR_EXTRACT_BMESH) {
BMFace *efa; BMFace *efa;
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