#include "mesh.h"
#include "debug.h"
#include "log.h"
+#include "irrMap.h"
#include <iostream>
#include <IAnimatedMesh.h>
#include <SAnimatedMesh.h>
#define MY_ETLM_READ_ONLY video::ETLM_READ_ONLY
#endif
+inline static void applyShadeFactor(video::SColor& color, float factor)
+{
+ color.setRed(core::clamp(core::round32(color.getRed()*factor), 0, 255));
+ color.setGreen(core::clamp(core::round32(color.getGreen()*factor), 0, 255));
+ color.setBlue(core::clamp(core::round32(color.getBlue()*factor), 0, 255));
+}
+
+void applyFacesShading(video::SColor &color, const v3f &normal)
+{
+ /*
+ Some drawtypes have normals set to (0, 0, 0), this must result in
+ maximum brightness: shade factor 1.0.
+ Shade factors for aligned cube faces are:
+ +Y 1.000000 sqrt(1.0)
+ -Y 0.447213 sqrt(0.2)
+ +-X 0.670820 sqrt(0.45)
+ +-Z 0.836660 sqrt(0.7)
+ */
+ float x2 = normal.X * normal.X;
+ float y2 = normal.Y * normal.Y;
+ float z2 = normal.Z * normal.Z;
+ if (normal.Y < 0)
+ applyShadeFactor(color, 0.670820f * x2 + 0.447213f * y2 + 0.836660f * z2);
+ else if ((x2 > 1e-3) || (z2 > 1e-3))
+ applyShadeFactor(color, 0.670820f * x2 + 1.000000f * y2 + 0.836660f * z2);
+}
+
scene::IAnimatedMesh* createCubeMesh(v3f scale)
{
video::SColor c(255,255,255,255);
void scaleMesh(scene::IMesh *mesh, v3f scale)
{
- if(mesh == NULL)
+ if (mesh == NULL)
return;
- core::aabbox3d<f32> bbox;
- bbox.reset(0,0,0);
+ aabb3f bbox;
+ bbox.reset(0, 0, 0);
- u16 mc = mesh->getMeshBufferCount();
- for(u16 j=0; j<mc; j++)
- {
+ u32 mc = mesh->getMeshBufferCount();
+ for (u32 j = 0; j < mc; j++) {
scene::IMeshBuffer *buf = mesh->getMeshBuffer(j);
- video::S3DVertex *vertices = (video::S3DVertex*)buf->getVertices();
- u16 vc = buf->getVertexCount();
- for(u16 i=0; i<vc; i++)
- {
- vertices[i].Pos *= scale;
- }
+ const u32 stride = getVertexPitchFromType(buf->getVertexType());
+ u32 vertex_count = buf->getVertexCount();
+ u8 *vertices = (u8 *)buf->getVertices();
+ for (u32 i = 0; i < vertex_count; i++)
+ ((video::S3DVertex *)(vertices + i * stride))->Pos *= scale;
+
buf->recalculateBoundingBox();
// calculate total bounding box
- if(j == 0)
+ if (j == 0)
bbox = buf->getBoundingBox();
else
bbox.addInternalBox(buf->getBoundingBox());
void translateMesh(scene::IMesh *mesh, v3f vec)
{
- if(mesh == NULL)
+ if (mesh == NULL)
return;
- core::aabbox3d<f32> bbox;
- bbox.reset(0,0,0);
+ aabb3f bbox;
+ bbox.reset(0, 0, 0);
- u16 mc = mesh->getMeshBufferCount();
- for(u16 j=0; j<mc; j++)
- {
+ u32 mc = mesh->getMeshBufferCount();
+ for (u32 j = 0; j < mc; j++) {
scene::IMeshBuffer *buf = mesh->getMeshBuffer(j);
- video::S3DVertex *vertices = (video::S3DVertex*)buf->getVertices();
- u16 vc = buf->getVertexCount();
- for(u16 i=0; i<vc; i++)
- {
- vertices[i].Pos += vec;
- }
+ const u32 stride = getVertexPitchFromType(buf->getVertexType());
+ u32 vertex_count = buf->getVertexCount();
+ u8 *vertices = (u8 *)buf->getVertices();
+ for (u32 i = 0; i < vertex_count; i++)
+ ((video::S3DVertex *)(vertices + i * stride))->Pos += vec;
+
buf->recalculateBoundingBox();
// calculate total bounding box
- if(j == 0)
+ if (j == 0)
bbox = buf->getBoundingBox();
else
bbox.addInternalBox(buf->getBoundingBox());
mesh->setBoundingBox(bbox);
}
+
void setMeshColor(scene::IMesh *mesh, const video::SColor &color)
{
- if(mesh == NULL)
+ if (mesh == NULL)
return;
-
- u16 mc = mesh->getMeshBufferCount();
- for(u16 j=0; j<mc; j++)
- {
+
+ u32 mc = mesh->getMeshBufferCount();
+ for (u32 j = 0; j < mc; j++) {
scene::IMeshBuffer *buf = mesh->getMeshBuffer(j);
- video::S3DVertex *vertices = (video::S3DVertex*)buf->getVertices();
- u16 vc = buf->getVertexCount();
- for(u16 i=0; i<vc; i++)
- {
- vertices[i].Color = color;
- }
+ const u32 stride = getVertexPitchFromType(buf->getVertexType());
+ u32 vertex_count = buf->getVertexCount();
+ u8 *vertices = (u8 *)buf->getVertices();
+ for (u32 i = 0; i < vertex_count; i++)
+ ((video::S3DVertex *)(vertices + i * stride))->Color = color;
+ }
+}
+
+void colorizeMeshBuffer(scene::IMeshBuffer *buf, const video::SColor *buffercolor)
+{
+ const u32 stride = getVertexPitchFromType(buf->getVertexType());
+ u32 vertex_count = buf->getVertexCount();
+ u8 *vertices = (u8 *) buf->getVertices();
+ for (u32 i = 0; i < vertex_count; i++) {
+ video::S3DVertex *vertex = (video::S3DVertex *) (vertices + i * stride);
+ video::SColor *vc = &(vertex->Color);
+ // Reset color
+ *vc = *buffercolor;
+ // Apply shading
+ applyFacesShading(*vc, vertex->Normal);
}
}
const video::SColor &colorY,
const video::SColor &colorZ)
{
- if(mesh == NULL)
+ if (mesh == NULL)
return;
-
+
u16 mc = mesh->getMeshBufferCount();
- for(u16 j=0; j<mc; j++)
- {
+ for (u16 j = 0; j < mc; j++) {
scene::IMeshBuffer *buf = mesh->getMeshBuffer(j);
- video::S3DVertex *vertices = (video::S3DVertex*)buf->getVertices();
- u16 vc = buf->getVertexCount();
- for(u16 i=0; i<vc; i++)
- {
- f32 x = fabs(vertices[i].Normal.X);
- f32 y = fabs(vertices[i].Normal.Y);
- f32 z = fabs(vertices[i].Normal.Z);
- if(x >= y && x >= z)
- vertices[i].Color = colorX;
- else if(y >= z)
- vertices[i].Color = colorY;
+ const u32 stride = getVertexPitchFromType(buf->getVertexType());
+ u32 vertex_count = buf->getVertexCount();
+ u8 *vertices = (u8 *)buf->getVertices();
+ for (u32 i = 0; i < vertex_count; i++) {
+ video::S3DVertex *vertex = (video::S3DVertex *)(vertices + i * stride);
+ f32 x = fabs(vertex->Normal.X);
+ f32 y = fabs(vertex->Normal.Y);
+ f32 z = fabs(vertex->Normal.Z);
+ if (x >= y && x >= z)
+ vertex->Color = colorX;
+ else if (y >= z)
+ vertex->Color = colorY;
else
- vertices[i].Color = colorZ;
+ vertex->Color = colorZ;
+ }
+ }
+}
+
+void setMeshColorByNormal(scene::IMesh *mesh, const v3f &normal,
+ const video::SColor &color)
+{
+ if (!mesh)
+ return;
+ u16 mc = mesh->getMeshBufferCount();
+ for (u16 j = 0; j < mc; j++) {
+ scene::IMeshBuffer *buf = mesh->getMeshBuffer(j);
+ const u32 stride = getVertexPitchFromType(buf->getVertexType());
+ u32 vertex_count = buf->getVertexCount();
+ u8 *vertices = (u8 *)buf->getVertices();
+ for (u32 i = 0; i < vertex_count; i++) {
+ video::S3DVertex *vertex = (video::S3DVertex *)(vertices + i * stride);
+ if (normal == vertex->Normal) {
+ vertex->Color = color;
+ }
}
}
}
+void rotateMeshXYby(scene::IMesh *mesh, f64 degrees)
+{
+ u16 mc = mesh->getMeshBufferCount();
+ for (u16 j = 0; j < mc; j++) {
+ scene::IMeshBuffer *buf = mesh->getMeshBuffer(j);
+ const u32 stride = getVertexPitchFromType(buf->getVertexType());
+ u32 vertex_count = buf->getVertexCount();
+ u8 *vertices = (u8 *)buf->getVertices();
+ for (u32 i = 0; i < vertex_count; i++)
+ ((video::S3DVertex *)(vertices + i * stride))->Pos.rotateXYBy(degrees);
+ }
+}
+
+void rotateMeshXZby(scene::IMesh *mesh, f64 degrees)
+{
+ u16 mc = mesh->getMeshBufferCount();
+ for (u16 j = 0; j < mc; j++) {
+ scene::IMeshBuffer *buf = mesh->getMeshBuffer(j);
+ const u32 stride = getVertexPitchFromType(buf->getVertexType());
+ u32 vertex_count = buf->getVertexCount();
+ u8 *vertices = (u8 *)buf->getVertices();
+ for (u32 i = 0; i < vertex_count; i++)
+ ((video::S3DVertex *)(vertices + i * stride))->Pos.rotateXZBy(degrees);
+ }
+}
+
+void rotateMeshYZby(scene::IMesh *mesh, f64 degrees)
+{
+ u16 mc = mesh->getMeshBufferCount();
+ for (u16 j = 0; j < mc; j++) {
+ scene::IMeshBuffer *buf = mesh->getMeshBuffer(j);
+ const u32 stride = getVertexPitchFromType(buf->getVertexType());
+ u32 vertex_count = buf->getVertexCount();
+ u8 *vertices = (u8 *)buf->getVertices();
+ for (u32 i = 0; i < vertex_count; i++)
+ ((video::S3DVertex *)(vertices + i * stride))->Pos.rotateYZBy(degrees);
+ }
+}
+
void rotateMeshBy6dFacedir(scene::IMesh *mesh, int facedir)
-{
- int axisdir = facedir>>2;
+{
+ int axisdir = facedir >> 2;
facedir &= 0x03;
u16 mc = mesh->getMeshBufferCount();
- for(u16 j = 0; j < mc; j++)
- {
+ for (u16 j = 0; j < mc; j++) {
scene::IMeshBuffer *buf = mesh->getMeshBuffer(j);
- video::S3DVertex *vertices = (video::S3DVertex*)buf->getVertices();
- u16 vc = buf->getVertexCount();
- for(u16 i=0; i<vc; i++)
- {
- switch (axisdir)
- {
- case 0:
- if(facedir == 1)
- vertices[i].Pos.rotateXZBy(-90);
- else if(facedir == 2)
- vertices[i].Pos.rotateXZBy(180);
- else if(facedir == 3)
- vertices[i].Pos.rotateXZBy(90);
- break;
- case 1: // z+
- vertices[i].Pos.rotateYZBy(90);
- if(facedir == 1)
- vertices[i].Pos.rotateXYBy(90);
- else if(facedir == 2)
- vertices[i].Pos.rotateXYBy(180);
- else if(facedir == 3)
- vertices[i].Pos.rotateXYBy(-90);
- break;
- case 2: //z-
- vertices[i].Pos.rotateYZBy(-90);
- if(facedir == 1)
- vertices[i].Pos.rotateXYBy(-90);
- else if(facedir == 2)
- vertices[i].Pos.rotateXYBy(180);
- else if(facedir == 3)
- vertices[i].Pos.rotateXYBy(90);
- break;
- case 3: //x+
- vertices[i].Pos.rotateXYBy(-90);
- if(facedir == 1)
- vertices[i].Pos.rotateYZBy(90);
- else if(facedir == 2)
- vertices[i].Pos.rotateYZBy(180);
- else if(facedir == 3)
- vertices[i].Pos.rotateYZBy(-90);
- break;
- case 4: //x-
- vertices[i].Pos.rotateXYBy(90);
- if(facedir == 1)
- vertices[i].Pos.rotateYZBy(-90);
- else if(facedir == 2)
- vertices[i].Pos.rotateYZBy(180);
- else if(facedir == 3)
- vertices[i].Pos.rotateYZBy(90);
- break;
- case 5:
- vertices[i].Pos.rotateXYBy(-180);
- if(facedir == 1)
- vertices[i].Pos.rotateXZBy(90);
- else if(facedir == 2)
- vertices[i].Pos.rotateXZBy(180);
- else if(facedir == 3)
- vertices[i].Pos.rotateXZBy(-90);
- break;
- default:
- break;
+ const u32 stride = getVertexPitchFromType(buf->getVertexType());
+ u32 vertex_count = buf->getVertexCount();
+ u8 *vertices = (u8 *)buf->getVertices();
+ for (u32 i = 0; i < vertex_count; i++) {
+ video::S3DVertex *vertex = (video::S3DVertex *)(vertices + i * stride);
+ switch (axisdir) {
+ case 0:
+ if (facedir == 1)
+ vertex->Pos.rotateXZBy(-90);
+ else if (facedir == 2)
+ vertex->Pos.rotateXZBy(180);
+ else if (facedir == 3)
+ vertex->Pos.rotateXZBy(90);
+ break;
+ case 1: // z+
+ vertex->Pos.rotateYZBy(90);
+ if (facedir == 1)
+ vertex->Pos.rotateXYBy(90);
+ else if (facedir == 2)
+ vertex->Pos.rotateXYBy(180);
+ else if (facedir == 3)
+ vertex->Pos.rotateXYBy(-90);
+ break;
+ case 2: //z-
+ vertex->Pos.rotateYZBy(-90);
+ if (facedir == 1)
+ vertex->Pos.rotateXYBy(-90);
+ else if (facedir == 2)
+ vertex->Pos.rotateXYBy(180);
+ else if (facedir == 3)
+ vertex->Pos.rotateXYBy(90);
+ break;
+ case 3: //x+
+ vertex->Pos.rotateXYBy(-90);
+ if (facedir == 1)
+ vertex->Pos.rotateYZBy(90);
+ else if (facedir == 2)
+ vertex->Pos.rotateYZBy(180);
+ else if (facedir == 3)
+ vertex->Pos.rotateYZBy(-90);
+ break;
+ case 4: //x-
+ vertex->Pos.rotateXYBy(90);
+ if (facedir == 1)
+ vertex->Pos.rotateYZBy(-90);
+ else if (facedir == 2)
+ vertex->Pos.rotateYZBy(180);
+ else if (facedir == 3)
+ vertex->Pos.rotateYZBy(90);
+ break;
+ case 5:
+ vertex->Pos.rotateXYBy(-180);
+ if (facedir == 1)
+ vertex->Pos.rotateXZBy(90);
+ else if (facedir == 2)
+ vertex->Pos.rotateXZBy(180);
+ else if (facedir == 3)
+ vertex->Pos.rotateXZBy(-90);
+ break;
+ default:
+ break;
}
}
}
void recalculateBoundingBox(scene::IMesh *src_mesh)
{
- core::aabbox3d<f32> bbox;
+ aabb3f bbox;
bbox.reset(0,0,0);
- for(u16 j = 0; j < src_mesh->getMeshBufferCount(); j++)
- {
+ for (u16 j = 0; j < src_mesh->getMeshBufferCount(); j++) {
scene::IMeshBuffer *buf = src_mesh->getMeshBuffer(j);
buf->recalculateBoundingBox();
- if(j == 0)
+ if (j == 0)
bbox = buf->getBoundingBox();
else
bbox.addInternalBox(buf->getBoundingBox());
src_mesh->setBoundingBox(bbox);
}
-scene::IMesh* cloneMesh(scene::IMesh *src_mesh)
+scene::IMeshBuffer* cloneMeshBuffer(scene::IMeshBuffer *mesh_buffer)
+{
+ switch (mesh_buffer->getVertexType()) {
+ case video::EVT_STANDARD: {
+ video::S3DVertex *v = (video::S3DVertex *) mesh_buffer->getVertices();
+ u16 *indices = mesh_buffer->getIndices();
+ scene::SMeshBuffer *cloned_buffer = new scene::SMeshBuffer();
+ cloned_buffer->append(v, mesh_buffer->getVertexCount(), indices,
+ mesh_buffer->getIndexCount());
+ return cloned_buffer;
+ }
+ case video::EVT_2TCOORDS: {
+ video::S3DVertex2TCoords *v =
+ (video::S3DVertex2TCoords *) mesh_buffer->getVertices();
+ u16 *indices = mesh_buffer->getIndices();
+ scene::SMeshBufferTangents *cloned_buffer =
+ new scene::SMeshBufferTangents();
+ cloned_buffer->append(v, mesh_buffer->getVertexCount(), indices,
+ mesh_buffer->getIndexCount());
+ return cloned_buffer;
+ }
+ case video::EVT_TANGENTS: {
+ video::S3DVertexTangents *v =
+ (video::S3DVertexTangents *) mesh_buffer->getVertices();
+ u16 *indices = mesh_buffer->getIndices();
+ scene::SMeshBufferTangents *cloned_buffer =
+ new scene::SMeshBufferTangents();
+ cloned_buffer->append(v, mesh_buffer->getVertexCount(), indices,
+ mesh_buffer->getIndexCount());
+ return cloned_buffer;
+ }
+ }
+ // This should not happen.
+ sanity_check(false);
+ return NULL;
+}
+
+scene::SMesh* cloneMesh(scene::IMesh *src_mesh)
{
scene::SMesh* dst_mesh = new scene::SMesh();
- for(u16 j = 0; j < src_mesh->getMeshBufferCount(); j++)
- {
- scene::IMeshBuffer *buf = src_mesh->getMeshBuffer(j);
- video::S3DVertex *vertices = (video::S3DVertex*)buf->getVertices();
- u16 *indices = (u16*)buf->getIndices();
- scene::SMeshBuffer *temp_buf = new scene::SMeshBuffer();
- temp_buf->append(vertices, buf->getVertexCount(),
- indices, buf->getIndexCount());
+ for (u16 j = 0; j < src_mesh->getMeshBufferCount(); j++) {
+ scene::IMeshBuffer *temp_buf = cloneMeshBuffer(
+ src_mesh->getMeshBuffer(j));
dst_mesh->addMeshBuffer(temp_buf);
temp_buf->drop();
+
}
- return dst_mesh;
+ return dst_mesh;
}
-scene::IMesh* convertNodeboxNodeToMesh(ContentFeatures *f)
+scene::IMesh* convertNodeboxesToMesh(const std::vector<aabb3f> &boxes,
+ const f32 *uv_coords, float expand)
{
scene::SMesh* dst_mesh = new scene::SMesh();
+
for (u16 j = 0; j < 6; j++)
{
scene::IMeshBuffer *buf = new scene::SMeshBuffer();
dst_mesh->addMeshBuffer(buf);
buf->drop();
}
-
- video::SColor c(255,255,255,255);
- std::vector<aabb3f> boxes = f->node_box.fixed;
-
- for(std::vector<aabb3f>::iterator
+ video::SColor c(255,255,255,255);
+
+ for (std::vector<aabb3f>::const_iterator
i = boxes.begin();
- i != boxes.end(); i++)
+ i != boxes.end(); ++i)
{
aabb3f box = *i;
+ box.repair();
- f32 temp;
- if (box.MinEdge.X > box.MaxEdge.X)
- {
- temp=box.MinEdge.X;
- box.MinEdge.X=box.MaxEdge.X;
- box.MaxEdge.X=temp;
- }
- if (box.MinEdge.Y > box.MaxEdge.Y)
- {
- temp=box.MinEdge.Y;
- box.MinEdge.Y=box.MaxEdge.Y;
- box.MaxEdge.Y=temp;
- }
- if (box.MinEdge.Z > box.MaxEdge.Z)
- {
- temp=box.MinEdge.Z;
- box.MinEdge.Z=box.MaxEdge.Z;
- box.MaxEdge.Z=temp;
- }
- // Compute texture coords
- f32 tx1 = (box.MinEdge.X/BS)+0.5;
- f32 ty1 = (box.MinEdge.Y/BS)+0.5;
- f32 tz1 = (box.MinEdge.Z/BS)+0.5;
- f32 tx2 = (box.MaxEdge.X/BS)+0.5;
- f32 ty2 = (box.MaxEdge.Y/BS)+0.5;
- f32 tz2 = (box.MaxEdge.Z/BS)+0.5;
- f32 txc[24] = {
+ box.MinEdge.X -= expand;
+ box.MinEdge.Y -= expand;
+ box.MinEdge.Z -= expand;
+ box.MaxEdge.X += expand;
+ box.MaxEdge.Y += expand;
+ box.MaxEdge.Z += expand;
+
+ // Compute texture UV coords
+ f32 tx1 = (box.MinEdge.X / BS) + 0.5;
+ f32 ty1 = (box.MinEdge.Y / BS) + 0.5;
+ f32 tz1 = (box.MinEdge.Z / BS) + 0.5;
+ f32 tx2 = (box.MaxEdge.X / BS) + 0.5;
+ f32 ty2 = (box.MaxEdge.Y / BS) + 0.5;
+ f32 tz2 = (box.MaxEdge.Z / BS) + 0.5;
+
+ f32 txc_default[24] = {
// up
- tx1, 1-tz2, tx2, 1-tz1,
+ tx1, 1 - tz2, tx2, 1 - tz1,
// down
tx1, tz1, tx2, tz2,
// right
- tz1, 1-ty2, tz2, 1-ty1,
+ tz1, 1 - ty2, tz2, 1 - ty1,
// left
- 1-tz2, 1-ty2, 1-tz1, 1-ty1,
+ 1 - tz2, 1 - ty2, 1 - tz1, 1 - ty1,
// back
- 1-tx2, 1-ty2, 1-tx1, 1-ty1,
+ 1 - tx2, 1 - ty2, 1 - tx1, 1 - ty1,
// front
- tx1, 1-ty2, tx2, 1-ty1,
+ tx1, 1 - ty2, tx2, 1 - ty1,
};
+
+ // use default texture UV mapping if not provided
+ const f32 *txc = uv_coords ? uv_coords : txc_default;
+
v3f min = box.MinEdge;
v3f max = box.MaxEdge;
buf->append(vertices + j, 4, indices, 6);
}
}
- return dst_mesh;
+ return dst_mesh;
+}
+
+struct vcache
+{
+ core::array<u32> tris;
+ float score;
+ s16 cachepos;
+ u16 NumActiveTris;
+};
+
+struct tcache
+{
+ u16 ind[3];
+ float score;
+ bool drawn;
+};
+
+const u16 cachesize = 32;
+
+float FindVertexScore(vcache *v)
+{
+ const float CacheDecayPower = 1.5f;
+ const float LastTriScore = 0.75f;
+ const float ValenceBoostScale = 2.0f;
+ const float ValenceBoostPower = 0.5f;
+ const float MaxSizeVertexCache = 32.0f;
+
+ if (v->NumActiveTris == 0)
+ {
+ // No tri needs this vertex!
+ return -1.0f;
+ }
+
+ float Score = 0.0f;
+ int CachePosition = v->cachepos;
+ if (CachePosition < 0)
+ {
+ // Vertex is not in FIFO cache - no score.
+ }
+ else
+ {
+ if (CachePosition < 3)
+ {
+ // This vertex was used in the last triangle,
+ // so it has a fixed score.
+ Score = LastTriScore;
+ }
+ else
+ {
+ // Points for being high in the cache.
+ const float Scaler = 1.0f / (MaxSizeVertexCache - 3);
+ Score = 1.0f - (CachePosition - 3) * Scaler;
+ Score = powf(Score, CacheDecayPower);
+ }
+ }
+
+ // Bonus points for having a low number of tris still to
+ // use the vert, so we get rid of lone verts quickly.
+ float ValenceBoost = powf(v->NumActiveTris,
+ -ValenceBoostPower);
+ Score += ValenceBoostScale * ValenceBoost;
+
+ return Score;
+}
+
+/*
+ A specialized LRU cache for the Forsyth algorithm.
+*/
+
+class f_lru
+{
+
+public:
+ f_lru(vcache *v, tcache *t): vc(v), tc(t)
+ {
+ for (u16 i = 0; i < cachesize; i++)
+ {
+ cache[i] = -1;
+ }
+ }
+
+ // Adds this vertex index and returns the highest-scoring triangle index
+ u32 add(u16 vert, bool updatetris = false)
+ {
+ bool found = false;
+
+ // Mark existing pos as empty
+ for (u16 i = 0; i < cachesize; i++)
+ {
+ if (cache[i] == vert)
+ {
+ // Move everything down
+ for (u16 j = i; j; j--)
+ {
+ cache[j] = cache[j - 1];
+ }
+
+ found = true;
+ break;
+ }
+ }
+
+ if (!found)
+ {
+ if (cache[cachesize-1] != -1)
+ vc[cache[cachesize-1]].cachepos = -1;
+
+ // Move everything down
+ for (u16 i = cachesize - 1; i; i--)
+ {
+ cache[i] = cache[i - 1];
+ }
+ }
+
+ cache[0] = vert;
+
+ u32 highest = 0;
+ float hiscore = 0;
+
+ if (updatetris)
+ {
+ // Update cache positions
+ for (u16 i = 0; i < cachesize; i++)
+ {
+ if (cache[i] == -1)
+ break;
+
+ vc[cache[i]].cachepos = i;
+ vc[cache[i]].score = FindVertexScore(&vc[cache[i]]);
+ }
+
+ // Update triangle scores
+ for (u16 i = 0; i < cachesize; i++)
+ {
+ if (cache[i] == -1)
+ break;
+
+ const u16 trisize = vc[cache[i]].tris.size();
+ for (u16 t = 0; t < trisize; t++)
+ {
+ tcache *tri = &tc[vc[cache[i]].tris[t]];
+
+ tri->score =
+ vc[tri->ind[0]].score +
+ vc[tri->ind[1]].score +
+ vc[tri->ind[2]].score;
+
+ if (tri->score > hiscore)
+ {
+ hiscore = tri->score;
+ highest = vc[cache[i]].tris[t];
+ }
+ }
+ }
+ }
+
+ return highest;
+ }
+
+private:
+ s32 cache[cachesize];
+ vcache *vc;
+ tcache *tc;
+};
+
+/**
+Vertex cache optimization according to the Forsyth paper:
+http://home.comcast.net/~tom_forsyth/papers/fast_vert_cache_opt.html
+
+The function is thread-safe (read: you can optimize several meshes in different threads)
+
+\param mesh Source mesh for the operation. */
+scene::IMesh* createForsythOptimizedMesh(const scene::IMesh *mesh)
+{
+ if (!mesh)
+ return 0;
+
+ scene::SMesh *newmesh = new scene::SMesh();
+ newmesh->BoundingBox = mesh->getBoundingBox();
+
+ const u32 mbcount = mesh->getMeshBufferCount();
+
+ for (u32 b = 0; b < mbcount; ++b)
+ {
+ const scene::IMeshBuffer *mb = mesh->getMeshBuffer(b);
+
+ if (mb->getIndexType() != video::EIT_16BIT)
+ {
+ //os::Printer::log("Cannot optimize a mesh with 32bit indices", ELL_ERROR);
+ newmesh->drop();
+ return 0;
+ }
+
+ const u32 icount = mb->getIndexCount();
+ const u32 tcount = icount / 3;
+ const u32 vcount = mb->getVertexCount();
+ const u16 *ind = mb->getIndices();
+
+ vcache *vc = new vcache[vcount];
+ tcache *tc = new tcache[tcount];
+
+ f_lru lru(vc, tc);
+
+ // init
+ for (u16 i = 0; i < vcount; i++)
+ {
+ vc[i].score = 0;
+ vc[i].cachepos = -1;
+ vc[i].NumActiveTris = 0;
+ }
+
+ // First pass: count how many times a vert is used
+ for (u32 i = 0; i < icount; i += 3)
+ {
+ vc[ind[i]].NumActiveTris++;
+ vc[ind[i + 1]].NumActiveTris++;
+ vc[ind[i + 2]].NumActiveTris++;
+
+ const u32 tri_ind = i/3;
+ tc[tri_ind].ind[0] = ind[i];
+ tc[tri_ind].ind[1] = ind[i + 1];
+ tc[tri_ind].ind[2] = ind[i + 2];
+ }
+
+ // Second pass: list of each triangle
+ for (u32 i = 0; i < tcount; i++)
+ {
+ vc[tc[i].ind[0]].tris.push_back(i);
+ vc[tc[i].ind[1]].tris.push_back(i);
+ vc[tc[i].ind[2]].tris.push_back(i);
+
+ tc[i].drawn = false;
+ }
+
+ // Give initial scores
+ for (u16 i = 0; i < vcount; i++)
+ {
+ vc[i].score = FindVertexScore(&vc[i]);
+ }
+ for (u32 i = 0; i < tcount; i++)
+ {
+ tc[i].score =
+ vc[tc[i].ind[0]].score +
+ vc[tc[i].ind[1]].score +
+ vc[tc[i].ind[2]].score;
+ }
+
+ switch(mb->getVertexType())
+ {
+ case video::EVT_STANDARD:
+ {
+ video::S3DVertex *v = (video::S3DVertex *) mb->getVertices();
+
+ scene::SMeshBuffer *buf = new scene::SMeshBuffer();
+ buf->Material = mb->getMaterial();
+
+ buf->Vertices.reallocate(vcount);
+ buf->Indices.reallocate(icount);
+
+ core::map<const video::S3DVertex, const u16> sind; // search index for fast operation
+ typedef core::map<const video::S3DVertex, const u16>::Node snode;
+
+ // Main algorithm
+ u32 highest = 0;
+ u32 drawcalls = 0;
+ for (;;)
+ {
+ if (tc[highest].drawn)
+ {
+ bool found = false;
+ float hiscore = 0;
+ for (u32 t = 0; t < tcount; t++)
+ {
+ if (!tc[t].drawn)
+ {
+ if (tc[t].score > hiscore)
+ {
+ highest = t;
+ hiscore = tc[t].score;
+ found = true;
+ }
+ }
+ }
+ if (!found)
+ break;
+ }
+
+ // Output the best triangle
+ u16 newind = buf->Vertices.size();
+
+ snode *s = sind.find(v[tc[highest].ind[0]]);
+
+ if (!s)
+ {
+ buf->Vertices.push_back(v[tc[highest].ind[0]]);
+ buf->Indices.push_back(newind);
+ sind.insert(v[tc[highest].ind[0]], newind);
+ newind++;
+ }
+ else
+ {
+ buf->Indices.push_back(s->getValue());
+ }
+
+ s = sind.find(v[tc[highest].ind[1]]);
+
+ if (!s)
+ {
+ buf->Vertices.push_back(v[tc[highest].ind[1]]);
+ buf->Indices.push_back(newind);
+ sind.insert(v[tc[highest].ind[1]], newind);
+ newind++;
+ }
+ else
+ {
+ buf->Indices.push_back(s->getValue());
+ }
+
+ s = sind.find(v[tc[highest].ind[2]]);
+
+ if (!s)
+ {
+ buf->Vertices.push_back(v[tc[highest].ind[2]]);
+ buf->Indices.push_back(newind);
+ sind.insert(v[tc[highest].ind[2]], newind);
+ }
+ else
+ {
+ buf->Indices.push_back(s->getValue());
+ }
+
+ vc[tc[highest].ind[0]].NumActiveTris--;
+ vc[tc[highest].ind[1]].NumActiveTris--;
+ vc[tc[highest].ind[2]].NumActiveTris--;
+
+ tc[highest].drawn = true;
+
+ for (u16 j = 0; j < 3; j++)
+ {
+ vcache *vert = &vc[tc[highest].ind[j]];
+ for (u16 t = 0; t < vert->tris.size(); t++)
+ {
+ if (highest == vert->tris[t])
+ {
+ vert->tris.erase(t);
+ break;
+ }
+ }
+ }
+
+ lru.add(tc[highest].ind[0]);
+ lru.add(tc[highest].ind[1]);
+ highest = lru.add(tc[highest].ind[2], true);
+ drawcalls++;
+ }
+
+ buf->setBoundingBox(mb->getBoundingBox());
+ newmesh->addMeshBuffer(buf);
+ buf->drop();
+ }
+ break;
+ case video::EVT_2TCOORDS:
+ {
+ video::S3DVertex2TCoords *v = (video::S3DVertex2TCoords *) mb->getVertices();
+
+ scene::SMeshBufferLightMap *buf = new scene::SMeshBufferLightMap();
+ buf->Material = mb->getMaterial();
+
+ buf->Vertices.reallocate(vcount);
+ buf->Indices.reallocate(icount);
+
+ core::map<const video::S3DVertex2TCoords, const u16> sind; // search index for fast operation
+ typedef core::map<const video::S3DVertex2TCoords, const u16>::Node snode;
+
+ // Main algorithm
+ u32 highest = 0;
+ u32 drawcalls = 0;
+ for (;;)
+ {
+ if (tc[highest].drawn)
+ {
+ bool found = false;
+ float hiscore = 0;
+ for (u32 t = 0; t < tcount; t++)
+ {
+ if (!tc[t].drawn)
+ {
+ if (tc[t].score > hiscore)
+ {
+ highest = t;
+ hiscore = tc[t].score;
+ found = true;
+ }
+ }
+ }
+ if (!found)
+ break;
+ }
+
+ // Output the best triangle
+ u16 newind = buf->Vertices.size();
+
+ snode *s = sind.find(v[tc[highest].ind[0]]);
+
+ if (!s)
+ {
+ buf->Vertices.push_back(v[tc[highest].ind[0]]);
+ buf->Indices.push_back(newind);
+ sind.insert(v[tc[highest].ind[0]], newind);
+ newind++;
+ }
+ else
+ {
+ buf->Indices.push_back(s->getValue());
+ }
+
+ s = sind.find(v[tc[highest].ind[1]]);
+
+ if (!s)
+ {
+ buf->Vertices.push_back(v[tc[highest].ind[1]]);
+ buf->Indices.push_back(newind);
+ sind.insert(v[tc[highest].ind[1]], newind);
+ newind++;
+ }
+ else
+ {
+ buf->Indices.push_back(s->getValue());
+ }
+
+ s = sind.find(v[tc[highest].ind[2]]);
+
+ if (!s)
+ {
+ buf->Vertices.push_back(v[tc[highest].ind[2]]);
+ buf->Indices.push_back(newind);
+ sind.insert(v[tc[highest].ind[2]], newind);
+ }
+ else
+ {
+ buf->Indices.push_back(s->getValue());
+ }
+
+ vc[tc[highest].ind[0]].NumActiveTris--;
+ vc[tc[highest].ind[1]].NumActiveTris--;
+ vc[tc[highest].ind[2]].NumActiveTris--;
+
+ tc[highest].drawn = true;
+
+ for (u16 j = 0; j < 3; j++)
+ {
+ vcache *vert = &vc[tc[highest].ind[j]];
+ for (u16 t = 0; t < vert->tris.size(); t++)
+ {
+ if (highest == vert->tris[t])
+ {
+ vert->tris.erase(t);
+ break;
+ }
+ }
+ }
+
+ lru.add(tc[highest].ind[0]);
+ lru.add(tc[highest].ind[1]);
+ highest = lru.add(tc[highest].ind[2]);
+ drawcalls++;
+ }
+
+ buf->setBoundingBox(mb->getBoundingBox());
+ newmesh->addMeshBuffer(buf);
+ buf->drop();
+
+ }
+ break;
+ case video::EVT_TANGENTS:
+ {
+ video::S3DVertexTangents *v = (video::S3DVertexTangents *) mb->getVertices();
+
+ scene::SMeshBufferTangents *buf = new scene::SMeshBufferTangents();
+ buf->Material = mb->getMaterial();
+
+ buf->Vertices.reallocate(vcount);
+ buf->Indices.reallocate(icount);
+
+ core::map<const video::S3DVertexTangents, const u16> sind; // search index for fast operation
+ typedef core::map<const video::S3DVertexTangents, const u16>::Node snode;
+
+ // Main algorithm
+ u32 highest = 0;
+ u32 drawcalls = 0;
+ for (;;)
+ {
+ if (tc[highest].drawn)
+ {
+ bool found = false;
+ float hiscore = 0;
+ for (u32 t = 0; t < tcount; t++)
+ {
+ if (!tc[t].drawn)
+ {
+ if (tc[t].score > hiscore)
+ {
+ highest = t;
+ hiscore = tc[t].score;
+ found = true;
+ }
+ }
+ }
+ if (!found)
+ break;
+ }
+
+ // Output the best triangle
+ u16 newind = buf->Vertices.size();
+
+ snode *s = sind.find(v[tc[highest].ind[0]]);
+
+ if (!s)
+ {
+ buf->Vertices.push_back(v[tc[highest].ind[0]]);
+ buf->Indices.push_back(newind);
+ sind.insert(v[tc[highest].ind[0]], newind);
+ newind++;
+ }
+ else
+ {
+ buf->Indices.push_back(s->getValue());
+ }
+
+ s = sind.find(v[tc[highest].ind[1]]);
+
+ if (!s)
+ {
+ buf->Vertices.push_back(v[tc[highest].ind[1]]);
+ buf->Indices.push_back(newind);
+ sind.insert(v[tc[highest].ind[1]], newind);
+ newind++;
+ }
+ else
+ {
+ buf->Indices.push_back(s->getValue());
+ }
+
+ s = sind.find(v[tc[highest].ind[2]]);
+
+ if (!s)
+ {
+ buf->Vertices.push_back(v[tc[highest].ind[2]]);
+ buf->Indices.push_back(newind);
+ sind.insert(v[tc[highest].ind[2]], newind);
+ }
+ else
+ {
+ buf->Indices.push_back(s->getValue());
+ }
+
+ vc[tc[highest].ind[0]].NumActiveTris--;
+ vc[tc[highest].ind[1]].NumActiveTris--;
+ vc[tc[highest].ind[2]].NumActiveTris--;
+
+ tc[highest].drawn = true;
+
+ for (u16 j = 0; j < 3; j++)
+ {
+ vcache *vert = &vc[tc[highest].ind[j]];
+ for (u16 t = 0; t < vert->tris.size(); t++)
+ {
+ if (highest == vert->tris[t])
+ {
+ vert->tris.erase(t);
+ break;
+ }
+ }
+ }
+
+ lru.add(tc[highest].ind[0]);
+ lru.add(tc[highest].ind[1]);
+ highest = lru.add(tc[highest].ind[2]);
+ drawcalls++;
+ }
+
+ buf->setBoundingBox(mb->getBoundingBox());
+ newmesh->addMeshBuffer(buf);
+ buf->drop();
+ }
+ break;
+ }
+
+ delete [] vc;
+ delete [] tc;
+
+ } // for each meshbuffer
+
+ return newmesh;
}
projects / oweals / minetest.git / blobdiff