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hoffstadthoffstadt
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feat: add mesh builder to mesh ext
1 parent b6f4462 commit 7060bc3

3 files changed

Lines changed: 181 additions & 2 deletions

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‎docs/version.txt‎

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Original file line numberDiff line numberDiff line change
@@ -89,6 +89,7 @@ the API is complete. It just means we won't break what currently exists.
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* Physics v0.2.0 (pl_physics_ext.h)
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* Collision v0.2.0 (pl_collision_ext.h)
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* Mesh v0.1.0 (pl_mesh_ext.h)
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* Mesh Builder v0.1.0 (pl_mesh_ext.h)
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* Shader Variant v0.2.0 (pl_shader_variant_ext.h)
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## Unstable Extensions

‎extensions/pl_mesh_ext.c‎

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@@ -36,10 +36,18 @@ Index of this file:
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#define PL_REALLOC(x, y) gptMemory->tracked_realloc((x), (y), __FILE__, __LINE__)
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#define PL_FREE(x) gptMemory->tracked_realloc((x), 0, __FILE__, __LINE__)
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#ifndef PL_DS_ALLOC
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#define PL_DS_ALLOC(x) gptMemory->tracked_realloc(NULL, (x), __FILE__, __LINE__)
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#define PL_DS_ALLOC_INDIRECT(x, FILE, LINE) gptMemory->tracked_realloc(NULL, (x), FILE, LINE)
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#define PL_DS_FREE(x) gptMemory->tracked_realloc((x), 0, __FILE__, __LINE__)
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#endif
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static const plLogI* gptLog = NULL;
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static const plEcsI* gptECS = NULL;
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#endif
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#include "pl_ds.h"
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//-----------------------------------------------------------------------------
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// [SECTION] structs
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//-----------------------------------------------------------------------------
@@ -49,6 +57,20 @@ typedef struct _plMeshContext
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plEcsTypeKey tMeshComponentType;
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} plMeshContext;
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typedef struct _plMeshBuilderTriangle
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{
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uint32_t uIndex0;
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uint32_t uIndex1;
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uint32_t uIndex2;
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} plMeshBuilderTriangle;
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typedef struct _plMeshBuilder
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{
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plMeshBuilderOptions tOptions;
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plVec3* sbtVertices;
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plMeshBuilderTriangle* sbtTriangles;
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} plMeshBuilder;
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//-----------------------------------------------------------------------------
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// [SECTION] global data
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//-----------------------------------------------------------------------------
@@ -561,9 +583,122 @@ pl_mesh_register_system(void)
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.tSkinComponent = {UINT32_MAX, UINT32_MAX}
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};
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gptMeshCtx->tMeshComponentType = gptECS->register_type(tMeshDesc, &tMeshComponentDefault);
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}
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plMeshBuilder*
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pl_mesh_builder_create(plMeshBuilderOptions tOptions)
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{
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if(tOptions.fWeldRadius == 0.0f)
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tOptions.fWeldRadius = 0.001f;
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plMeshBuilder* ptBuilder = PL_ALLOC(sizeof(ptBuilder));
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memset(ptBuilder, 0, sizeof(plMeshBuilder));
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ptBuilder->tOptions = tOptions;
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return ptBuilder;
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}
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void
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pl_mesh_builder_cleanup(plMeshBuilder* ptBuilder)
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{
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pl_sb_free(ptBuilder->sbtTriangles);
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pl_sb_free(ptBuilder->sbtVertices);
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PL_FREE(ptBuilder);
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}
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void
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pl_mesh_builder_add_triangle(plMeshBuilder* ptBuilder, plVec3 tA, plVec3 tB, plVec3 tC)
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{
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plMeshBuilderTriangle tTriangle;
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tTriangle.uIndex0 = UINT32_MAX;
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tTriangle.uIndex1 = UINT32_MAX;
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tTriangle.uIndex2 = UINT32_MAX;
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const float fWeldRadiusSqr = ptBuilder->tOptions.fWeldRadius * ptBuilder->tOptions.fWeldRadius;
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const uint32_t uVertexCount = pl_sb_size(ptBuilder->sbtVertices);
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for(uint32_t i = 0; i < uVertexCount; i++)
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{
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const plVec3* ptVertex = &ptBuilder->sbtVertices[i];
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float fDist = pl_length_sqr_vec3(pl_sub_vec3(*ptVertex, tA));
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if(fDist < fWeldRadiusSqr)
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{
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tTriangle.uIndex0 = i;
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break;
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}
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}
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for(uint32_t i = 0; i < uVertexCount; i++)
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{
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const plVec3* ptVertex = &ptBuilder->sbtVertices[i];
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float fDist = pl_length_sqr_vec3(pl_sub_vec3(*ptVertex, tB));
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if(fDist < fWeldRadiusSqr)
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{
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tTriangle.uIndex1 = i;
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break;
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}
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}
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for(uint32_t i = 0; i < uVertexCount; i++)
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{
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const plVec3* ptVertex = &ptBuilder->sbtVertices[i];
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float fDist = pl_length_sqr_vec3(pl_sub_vec3(*ptVertex, tC));
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if(fDist < fWeldRadiusSqr)
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{
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tTriangle.uIndex2 = i;
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break;
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}
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}
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if(tTriangle.uIndex0 == UINT32_MAX)
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{
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tTriangle.uIndex0 = pl_sb_size(ptBuilder->sbtVertices);
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pl_sb_push(ptBuilder->sbtVertices, tA);
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}
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if(tTriangle.uIndex1 == UINT32_MAX)
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{
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tTriangle.uIndex1 = pl_sb_size(ptBuilder->sbtVertices);
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pl_sb_push(ptBuilder->sbtVertices, tB);
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}
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if(tTriangle.uIndex2 == UINT32_MAX)
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{
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tTriangle.uIndex2 = pl_sb_size(ptBuilder->sbtVertices);
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pl_sb_push(ptBuilder->sbtVertices, tC);
675+
}
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pl_sb_push(ptBuilder->sbtTriangles, tTriangle);
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}
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void
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pl_mesh_builder_commit(plMeshBuilder* ptBuilder, uint32_t* puIndexBuffer, plVec3* ptVertexBuffer, uint32_t* puIndexBufferCountOut, uint32_t* puVertexBufferCountOut)
682+
{
683+
const uint32_t uVertexCount = pl_sb_size(ptBuilder->sbtVertices);
684+
const uint32_t uTriangleCount = pl_sb_size(ptBuilder->sbtTriangles);
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if(puVertexBufferCountOut)
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*puVertexBufferCountOut = uVertexCount;
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if(puIndexBufferCountOut)
690+
*puIndexBufferCountOut = uTriangleCount * 3;
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if(puIndexBuffer && ptVertexBuffer)
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{
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memcpy(puIndexBuffer, ptBuilder->sbtTriangles, uTriangleCount * 3 * sizeof(uint32_t));
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memcpy(ptVertexBuffer, ptBuilder->sbtVertices, uVertexCount * sizeof(plVec3));
696+
pl_sb_reset(ptBuilder->sbtTriangles);
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pl_sb_reset(ptBuilder->sbtVertices);
698+
}
699+
}
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567702
//-----------------------------------------------------------------------------
568703
// [SECTION] extension loading
569704
//-----------------------------------------------------------------------------
@@ -584,6 +719,14 @@ pl_load_mesh_ext(plApiRegistryI* ptApiRegistry, bool bReload)
584719
};
585720
pl_set_api(ptApiRegistry, plMeshI, &tApi);
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const plMeshBuilderI tApi2 = {
723+
.create = pl_mesh_builder_create,
724+
.cleanup = pl_mesh_builder_cleanup,
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.add_triangle = pl_mesh_builder_add_triangle,
726+
.commit = pl_mesh_builder_commit,
727+
};
728+
pl_set_api(ptApiRegistry, plMeshBuilderI, &tApi2);
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gptECS = pl_get_api_latest(ptApiRegistry, plEcsI);
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gptMemory = pl_get_api_latest(ptApiRegistry, plMemoryI);
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gptLog = pl_get_api_latest(ptApiRegistry, plLogI);
@@ -610,4 +753,7 @@ pl_unload_mesh_ext(plApiRegistryI* ptApiRegistry, bool bReload)
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611754
const plMeshI* ptApi = pl_get_api_latest(ptApiRegistry, plMeshI);
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ptApiRegistry->remove_api(ptApi);
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757+
const plMeshBuilderI* ptApi2 = pl_get_api_latest(ptApiRegistry, plMeshBuilderI);
758+
ptApiRegistry->remove_api(ptApi2);
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}

‎extensions/pl_mesh_ext.h‎

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Original file line numberDiff line numberDiff line change
@@ -9,7 +9,7 @@ Index of this file:
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// [SECTION] apis
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// [SECTION] includes
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// [SECTION] forward declarations & basic types
12-
// [SECTION] public api struct
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// [SECTION] public api structs
1313
// [SECTION] structs
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// [SECTION] enums
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*/
@@ -40,6 +40,7 @@ Index of this file:
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//-----------------------------------------------------------------------------
4141

4242
#define plMeshI_version {0, 1, 0}
43+
#define plMeshBuilderI_version {0, 1, 0}
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4445
//-----------------------------------------------------------------------------
4546
// [SECTION] includes
@@ -52,17 +53,22 @@ Index of this file:
5253
// [SECTION] forward declarations & basic types
5354
//-----------------------------------------------------------------------------
5455

56+
// basic types
57+
typedef struct _plMeshBuilder plMeshBuilder; // opaque
58+
typedef struct _plMeshBuilderOptions plMeshBuilderOptions;
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5560
// ecs components
5661
typedef struct _plMeshComponent plMeshComponent;
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5863
// enums & flags
5964
typedef int plMeshFormatFlags;
65+
typedef int plMeshBuilderFlags;
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6167
// external
6268
typedef struct _plComponentLibrary plComponentLibrary; // pl_ecs_ext.h
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6470
//-----------------------------------------------------------------------------
65-
// [SECTION] public api struct
71+
// [SECTION] public api structs
6672
//-----------------------------------------------------------------------------
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6874
typedef struct _plMeshI
@@ -87,10 +93,30 @@ typedef struct _plMeshI
8793
plEcsTypeKey (*get_ecs_type_key_mesh)(void);
8894
} plMeshI;
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96+
typedef struct _plMeshBuilderI
97+
{
98+
// setup/shutdown
99+
plMeshBuilder* (*create)(plMeshBuilderOptions);
100+
void (*cleanup)(plMeshBuilder*);
101+
102+
// adding
103+
void (*add_triangle)(plMeshBuilder*, plVec3, plVec3, plVec3);
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105+
// commit
106+
void (*commit)(plMeshBuilder*, uint32_t* indexBuffer, plVec3* vertexBuffer, uint32_t* indexBufferCountOut, uint32_t* vertexBufferCountOut);
107+
108+
} plMeshBuilderI;
109+
90110
//-----------------------------------------------------------------------------
91111
// [SECTION] structs
92112
//-----------------------------------------------------------------------------
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114+
typedef struct _plMeshBuilderOptions
115+
{
116+
plMeshBuilderFlags tFlags;
117+
float fWeldRadius;
118+
} plMeshBuilderOptions;
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94120
typedef struct _plMeshComponent
95121
{
96122
uint64_t ulVertexStreamMask;
@@ -132,4 +158,10 @@ enum _plMeshFormatFlags
132158
PL_MESH_FORMAT_FLAG_HAS_WEIGHTS_1 = 1 << 12
133159
};
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161+
enum _plMeshBuilderFlags
162+
{
163+
PL_MESH_BUILDER_FLAGS_NONE = 0,
164+
// PL_MESH_BUILDER_FLAGS_DOUBLE_SIDED = 1 << 0,
165+
};
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#endif // PL_MESH_EXT_H

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