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diff --git a/src/mesh.cpp b/src/mesh.cpp
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+/*
+Minetest-c55
+Copyright (C) 2010-2011 celeron55, Perttu Ahola <celeron55@gmail.com>
+
+This program is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License along
+with this program; if not, write to the Free Software Foundation, Inc.,
+51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+*/
+
+#include "mesh.h"
+#include <IAnimatedMesh.h>
+#include <SAnimatedMesh.h>
+
+// In Irrlicht 1.8 the signature of ITexture::lock was changed from
+// (bool, u32) to (E_TEXTURE_LOCK_MODE, u32).
+#if IRRLICHT_VERSION_MAJOR == 1 && IRRLICHT_VERSION_MINOR <= 7
+#define MY_ETLM_READ_ONLY true
+#else
+#define MY_ETLM_READ_ONLY video::ETLM_READ_ONLY
+#endif
+
+scene::IAnimatedMesh* createCubeMesh(v3f scale)
+{
+ video::SColor c(255,255,255,255);
+ video::S3DVertex vertices[24] =
+ {
+ // Up
+ video::S3DVertex(-0.5,+0.5,-0.5, 0,1,0, c, 0,1),
+ video::S3DVertex(-0.5,+0.5,+0.5, 0,1,0, c, 0,0),
+ video::S3DVertex(+0.5,+0.5,+0.5, 0,1,0, c, 1,0),
+ video::S3DVertex(+0.5,+0.5,-0.5, 0,1,0, c, 1,1),
+ // Down
+ video::S3DVertex(-0.5,-0.5,-0.5, 0,-1,0, c, 0,0),
+ video::S3DVertex(+0.5,-0.5,-0.5, 0,-1,0, c, 1,0),
+ video::S3DVertex(+0.5,-0.5,+0.5, 0,-1,0, c, 1,1),
+ video::S3DVertex(-0.5,-0.5,+0.5, 0,-1,0, c, 0,1),
+ // Right
+ video::S3DVertex(+0.5,-0.5,-0.5, 1,0,0, c, 0,1),
+ video::S3DVertex(+0.5,+0.5,-0.5, 1,0,0, c, 0,0),
+ video::S3DVertex(+0.5,+0.5,+0.5, 1,0,0, c, 1,0),
+ video::S3DVertex(+0.5,-0.5,+0.5, 1,0,0, c, 1,1),
+ // Left
+ video::S3DVertex(-0.5,-0.5,-0.5, -1,0,0, c, 1,1),
+ video::S3DVertex(-0.5,-0.5,+0.5, -1,0,0, c, 0,1),
+ video::S3DVertex(-0.5,+0.5,+0.5, -1,0,0, c, 0,0),
+ video::S3DVertex(-0.5,+0.5,-0.5, -1,0,0, c, 1,0),
+ // Back
+ video::S3DVertex(-0.5,-0.5,+0.5, 0,0,1, c, 1,1),
+ video::S3DVertex(+0.5,-0.5,+0.5, 0,0,1, c, 0,1),
+ video::S3DVertex(+0.5,+0.5,+0.5, 0,0,1, c, 0,0),
+ video::S3DVertex(-0.5,+0.5,+0.5, 0,0,1, c, 1,0),
+ // Front
+ video::S3DVertex(-0.5,-0.5,-0.5, 0,0,-1, c, 0,1),
+ video::S3DVertex(-0.5,+0.5,-0.5, 0,0,-1, c, 0,0),
+ video::S3DVertex(+0.5,+0.5,-0.5, 0,0,-1, c, 1,0),
+ video::S3DVertex(+0.5,-0.5,-0.5, 0,0,-1, c, 1,1),
+ };
+
+ u16 indices[6] = {0,1,2,2,3,0};
+
+ scene::SMesh *mesh = new scene::SMesh();
+ for (u32 i=0; i<6; ++i)
+ {
+ scene::IMeshBuffer *buf = new scene::SMeshBuffer();
+ buf->append(vertices + 4 * i, 4, indices, 6);
+ mesh->addMeshBuffer(buf);
+ buf->drop();
+ }
+ scene::SAnimatedMesh *anim_mesh = new scene::SAnimatedMesh(mesh);
+ mesh->drop();
+ scaleMesh(anim_mesh, scale); // also recalculates bounding box
+ return anim_mesh;
+}
+
+static scene::IAnimatedMesh* extrudeARGB(u32 twidth, u32 theight, u8 *data)
+{
+ const s32 argb_wstep = 4 * twidth;
+ const s32 alpha_threshold = 1;
+
+ scene::IMeshBuffer *buf = new scene::SMeshBuffer();
+ video::SColor c(255,255,255,255);
+
+ // Front and back
+ {
+ video::S3DVertex vertices[8] =
+ {
+ video::S3DVertex(-0.5,-0.5,-0.5, 0,0,-1, c, 0,1),
+ video::S3DVertex(-0.5,+0.5,-0.5, 0,0,-1, c, 0,0),
+ video::S3DVertex(+0.5,+0.5,-0.5, 0,0,-1, c, 1,0),
+ video::S3DVertex(+0.5,-0.5,-0.5, 0,0,-1, c, 1,1),
+ video::S3DVertex(+0.5,-0.5,+0.5, 0,0,+1, c, 1,1),
+ video::S3DVertex(+0.5,+0.5,+0.5, 0,0,+1, c, 1,0),
+ video::S3DVertex(-0.5,+0.5,+0.5, 0,0,+1, c, 0,0),
+ video::S3DVertex(-0.5,-0.5,+0.5, 0,0,+1, c, 0,1),
+ };
+ u16 indices[12] = {0,1,2,2,3,0,4,5,6,6,7,4};
+ buf->append(vertices, 8, indices, 12);
+ }
+
+ // "Interior"
+ // (add faces where a solid pixel is next to a transparent one)
+ u8 *solidity = new u8[(twidth+2) * (theight+2)];
+ u32 wstep = twidth + 2;
+ for (u32 y = 0; y < theight + 2; ++y)
+ {
+ u8 *scanline = solidity + y * wstep;
+ if (y == 0 || y == theight + 1)
+ {
+ for (u32 x = 0; x < twidth + 2; ++x)
+ scanline[x] = 0;
+ }
+ else
+ {
+ scanline[0] = 0;
+ u8 *argb_scanline = data + (y - 1) * argb_wstep;
+ for (u32 x = 0; x < twidth; ++x)
+ scanline[x+1] = (argb_scanline[x*4+3] >= alpha_threshold);
+ scanline[twidth + 1] = 0;
+ }
+ }
+
+ // without this, there would be occasional "holes" in the mesh
+ f32 eps = 0.01;
+
+ for (u32 y = 0; y <= theight; ++y)
+ {
+ u8 *scanline = solidity + y * wstep + 1;
+ for (u32 x = 0; x <= twidth; ++x)
+ {
+ if (scanline[x] && !scanline[x + wstep])
+ {
+ u32 xx = x + 1;
+ while (scanline[xx] && !scanline[xx + wstep])
+ ++xx;
+ f32 vx1 = (x - eps) / (f32) twidth - 0.5;
+ f32 vx2 = (xx + eps) / (f32) twidth - 0.5;
+ f32 vy = 0.5 - (y - eps) / (f32) theight;
+ f32 tx1 = x / (f32) twidth;
+ f32 tx2 = xx / (f32) twidth;
+ f32 ty = (y - 0.5) / (f32) theight;
+ video::S3DVertex vertices[8] =
+ {
+ video::S3DVertex(vx1,vy,-0.5, 0,-1,0, c, tx1,ty),
+ video::S3DVertex(vx2,vy,-0.5, 0,-1,0, c, tx2,ty),
+ video::S3DVertex(vx2,vy,+0.5, 0,-1,0, c, tx2,ty),
+ video::S3DVertex(vx1,vy,+0.5, 0,-1,0, c, tx1,ty),
+ };
+ u16 indices[6] = {0,1,2,2,3,0};
+ buf->append(vertices, 4, indices, 6);
+ x = xx - 1;
+ }
+ if (!scanline[x] && scanline[x + wstep])
+ {
+ u32 xx = x + 1;
+ while (!scanline[xx] && scanline[xx + wstep])
+ ++xx;
+ f32 vx1 = (x - eps) / (f32) twidth - 0.5;
+ f32 vx2 = (xx + eps) / (f32) twidth - 0.5;
+ f32 vy = 0.5 - (y + eps) / (f32) theight;
+ f32 tx1 = x / (f32) twidth;
+ f32 tx2 = xx / (f32) twidth;
+ f32 ty = (y + 0.5) / (f32) theight;
+ video::S3DVertex vertices[8] =
+ {
+ video::S3DVertex(vx1,vy,-0.5, 0,1,0, c, tx1,ty),
+ video::S3DVertex(vx1,vy,+0.5, 0,1,0, c, tx1,ty),
+ video::S3DVertex(vx2,vy,+0.5, 0,1,0, c, tx2,ty),
+ video::S3DVertex(vx2,vy,-0.5, 0,1,0, c, tx2,ty),
+ };
+ u16 indices[6] = {0,1,2,2,3,0};
+ buf->append(vertices, 4, indices, 6);
+ x = xx - 1;
+ }
+ }
+ }
+
+ for (u32 x = 0; x <= twidth; ++x)
+ {
+ u8 *scancol = solidity + x + wstep;
+ for (u32 y = 0; y <= theight; ++y)
+ {
+ if (scancol[y * wstep] && !scancol[y * wstep + 1])
+ {
+ u32 yy = y + 1;
+ while (scancol[yy * wstep] && !scancol[yy * wstep + 1])
+ ++yy;
+ f32 vx = (x - eps) / (f32) twidth - 0.5;
+ f32 vy1 = 0.5 - (y - eps) / (f32) theight;
+ f32 vy2 = 0.5 - (yy + eps) / (f32) theight;
+ f32 tx = (x - 0.5) / (f32) twidth;
+ f32 ty1 = y / (f32) theight;
+ f32 ty2 = yy / (f32) theight;
+ video::S3DVertex vertices[8] =
+ {
+ video::S3DVertex(vx,vy1,-0.5, 1,0,0, c, tx,ty1),
+ video::S3DVertex(vx,vy1,+0.5, 1,0,0, c, tx,ty1),
+ video::S3DVertex(vx,vy2,+0.5, 1,0,0, c, tx,ty2),
+ video::S3DVertex(vx,vy2,-0.5, 1,0,0, c, tx,ty2),
+ };
+ u16 indices[6] = {0,1,2,2,3,0};
+ buf->append(vertices, 4, indices, 6);
+ y = yy - 1;
+ }
+ if (!scancol[y * wstep] && scancol[y * wstep + 1])
+ {
+ u32 yy = y + 1;
+ while (!scancol[yy * wstep] && scancol[yy * wstep + 1])
+ ++yy;
+ f32 vx = (x + eps) / (f32) twidth - 0.5;
+ f32 vy1 = 0.5 - (y - eps) / (f32) theight;
+ f32 vy2 = 0.5 - (yy + eps) / (f32) theight;
+ f32 tx = (x + 0.5) / (f32) twidth;
+ f32 ty1 = y / (f32) theight;
+ f32 ty2 = yy / (f32) theight;
+ video::S3DVertex vertices[8] =
+ {
+ video::S3DVertex(vx,vy1,-0.5, -1,0,0, c, tx,ty1),
+ video::S3DVertex(vx,vy2,-0.5, -1,0,0, c, tx,ty2),
+ video::S3DVertex(vx,vy2,+0.5, -1,0,0, c, tx,ty2),
+ video::S3DVertex(vx,vy1,+0.5, -1,0,0, c, tx,ty1),
+ };
+ u16 indices[6] = {0,1,2,2,3,0};
+ buf->append(vertices, 4, indices, 6);
+ y = yy - 1;
+ }
+ }
+ }
+
+ // Add to mesh
+ scene::SMesh *mesh = new scene::SMesh();
+ mesh->addMeshBuffer(buf);
+ buf->drop();
+ scene::SAnimatedMesh *anim_mesh = new scene::SAnimatedMesh(mesh);
+ mesh->drop();
+ return anim_mesh;
+}
+
+scene::IAnimatedMesh* createExtrudedMesh(video::ITexture *texture,
+ video::IVideoDriver *driver, v3f scale)
+{
+ scene::IAnimatedMesh *mesh = NULL;
+ core::dimension2d<u32> size = texture->getSize();
+ video::ECOLOR_FORMAT format = texture->getColorFormat();
+ if (format == video::ECF_A8R8G8B8)
+ {
+ // Texture is in the correct color format, we can pass it
+ // to extrudeARGB right away.
+ void *data = texture->lock(MY_ETLM_READ_ONLY);
+ if (data == NULL)
+ return NULL;
+ mesh = extrudeARGB(size.Width, size.Height, (u8*) data);
+ texture->unlock();
+ }
+ else
+ {
+ video::IImage *img1 = driver->createImageFromData(format, size, texture->lock(MY_ETLM_READ_ONLY));
+ if (img1 == NULL)
+ return NULL;
+
+ // img1 is in the texture's color format, convert to 8-bit ARGB
+ video::IImage *img2 = driver->createImage(video::ECF_A8R8G8B8, size);
+ if (img2 != NULL)
+ {
+ img1->copyTo(img2);
+ img1->drop();
+
+ mesh = extrudeARGB(size.Width, size.Height, (u8*) img2->lock());
+ img2->unlock();
+ img2->drop();
+ }
+ img1->drop();
+ }
+ scaleMesh(mesh, scale); // also recalculates bounding box
+ return mesh;
+}
+
+void scaleMesh(scene::IMesh *mesh, v3f scale)
+{
+ if(mesh == NULL)
+ return;
+
+ core::aabbox3d<f32> bbox;
+ bbox.reset(0,0,0);
+
+ u16 mc = mesh->getMeshBufferCount();
+ 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++)
+ {
+ vertices[i].Pos *= scale;
+ }
+ buf->recalculateBoundingBox();
+
+ // calculate total bounding box
+ 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)
+ return;
+
+ u16 mc = mesh->getMeshBufferCount();
+ 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++)
+ {
+ vertices[i].Color = color;
+ }
+ }
+}
+
+void setMeshColorByNormalXYZ(scene::IMesh *mesh,
+ const video::SColor &colorX,
+ const video::SColor &colorY,
+ const video::SColor &colorZ)
+{
+ if(mesh == NULL)
+ return;
+
+ u16 mc = mesh->getMeshBufferCount();
+ 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;
+ else
+ vertices[i].Color = colorZ;
+
+ }
+ }
+}
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