+#include <stdio.h>
+#include <stdlib.h>
+#include <float.h>
+#include <assert.h>
+#include "opengl.h"
+#include "mesh.h"
+//#include "logger.h"
+//#include "xform_node.h"
+
+#define USE_OLDGL
+
+bool Mesh::use_custom_sdr_attr = true;
+int Mesh::global_sdr_loc[NUM_MESH_ATTR] = { 0, 1, 2, 3, 4, 5, 6, 7 };
+unsigned int Mesh::intersect_mode = ISECT_DEFAULT;
+float Mesh::vertex_sel_dist = 0.01;
+float Mesh::vis_vecsize = 1.0;
+
+Mesh::Mesh()
+{
+ clear();
+
+ glGenBuffers(NUM_MESH_ATTR + 1, buffer_objects);
+
+ for(int i=0; i<NUM_MESH_ATTR; i++) {
+ vattr[i].vbo = buffer_objects[i];
+ }
+ ibo = buffer_objects[NUM_MESH_ATTR];
+ wire_ibo = 0;
+}
+
+Mesh::~Mesh()
+{
+ glDeleteBuffers(NUM_MESH_ATTR + 1, buffer_objects);
+
+ if(wire_ibo) {
+ glDeleteBuffers(1, &wire_ibo);
+ }
+}
+
+Mesh::Mesh(const Mesh &rhs)
+{
+ clear();
+
+ glGenBuffers(NUM_MESH_ATTR + 1, buffer_objects);
+
+ for(int i=0; i<NUM_MESH_ATTR; i++) {
+ vattr[i].vbo = buffer_objects[i];
+ }
+ ibo = buffer_objects[NUM_MESH_ATTR];
+ wire_ibo = 0;
+
+ clone(rhs);
+}
+
+Mesh &Mesh::operator =(const Mesh &rhs)
+{
+ if(&rhs != this) {
+ clone(rhs);
+ }
+ return *this;
+}
+
+bool Mesh::clone(const Mesh &m)
+{
+ clear();
+
+ for(int i=0; i<NUM_MESH_ATTR; i++) {
+ if(m.has_attrib(i)) {
+ m.get_attrib_data(i); // force validation of the actual data on the source mesh
+
+ vattr[i].nelem = m.vattr[i].nelem;
+ vattr[i].data = m.vattr[i].data; // copy the actual data
+ vattr[i].data_valid = true;
+ }
+ }
+
+ if(m.is_indexed()) {
+ m.get_index_data(); // again, force validation
+
+ // copy the index data
+ idata = m.idata;
+ idata_valid = true;
+ }
+
+ name = m.name;
+ nverts = m.nverts;
+ nfaces = m.nfaces;
+
+ //bones = m.bones;
+
+ memcpy(cur_val, m.cur_val, sizeof cur_val);
+
+ aabb = m.aabb;
+ aabb_valid = m.aabb_valid;
+ bsph = m.bsph;
+ bsph_valid = m.bsph_valid;
+
+ hitface = m.hitface;
+ hitvert = m.hitvert;
+
+ intersect_mode = m.intersect_mode;
+ vertex_sel_dist = m.vertex_sel_dist;
+ vis_vecsize = m.vis_vecsize;
+
+ return true;
+}
+
+void Mesh::set_name(const char *name)
+{
+ this->name = name;
+}
+
+const char *Mesh::get_name() const
+{
+ return name.c_str();
+}
+
+bool Mesh::has_attrib(int attr) const
+{
+ if(attr < 0 || attr >= NUM_MESH_ATTR) {
+ return false;
+ }
+
+ // if neither of these is valid, then nobody has set this attribute
+ return vattr[attr].vbo_valid || vattr[attr].data_valid;
+}
+
+bool Mesh::is_indexed() const
+{
+ return ibo_valid || idata_valid;
+}
+
+void Mesh::clear()
+{
+ //bones.clear();
+
+ for(int i=0; i<NUM_MESH_ATTR; i++) {
+ vattr[i].nelem = 0;
+ vattr[i].vbo_valid = false;
+ vattr[i].data_valid = false;
+ //vattr[i].sdr_loc = -1;
+ vattr[i].data.clear();
+ }
+ ibo_valid = idata_valid = false;
+ idata.clear();
+
+ wire_ibo_valid = false;
+
+ nverts = nfaces = 0;
+
+ bsph_valid = false;
+ aabb_valid = false;
+}
+
+float *Mesh::set_attrib_data(int attrib, int nelem, unsigned int num, const float *data)
+{
+ if(attrib < 0 || attrib >= NUM_MESH_ATTR) {
+ fprintf(stderr, "%s: invalid attrib: %d\n", __FUNCTION__, attrib);
+ return 0;
+ }
+
+ if(nverts && num != nverts) {
+ fprintf(stderr, "%s: attribute count missmatch (%d instead of %d)\n", __FUNCTION__, num, nverts);
+ return 0;
+ }
+ nverts = num;
+
+ vattr[attrib].data.clear();
+ vattr[attrib].nelem = nelem;
+ vattr[attrib].data.resize(num * nelem);
+
+ if(data) {
+ memcpy(&vattr[attrib].data[0], data, num * nelem * sizeof *data);
+ }
+
+ vattr[attrib].data_valid = true;
+ vattr[attrib].vbo_valid = false;
+ return &vattr[attrib].data[0];
+}
+
+float *Mesh::get_attrib_data(int attrib)
+{
+ if(attrib < 0 || attrib >= NUM_MESH_ATTR) {
+ fprintf(stderr, "%s: invalid attrib: %d\n", __FUNCTION__, attrib);
+ return 0;
+ }
+
+ vattr[attrib].vbo_valid = false;
+ return (float*)((const Mesh*)this)->get_attrib_data(attrib);
+}
+
+const float *Mesh::get_attrib_data(int attrib) const
+{
+ if(attrib < 0 || attrib >= NUM_MESH_ATTR) {
+ fprintf(stderr, "%s: invalid attrib: %d\n", __FUNCTION__, attrib);
+ return 0;
+ }
+
+ if(!vattr[attrib].data_valid) {
+#if GL_ES_VERSION_2_0
+ fprintf(stderr, "%s: can't read back attrib data on CrippledGL ES\n", __FUNCTION__);
+ return 0;
+#else
+ if(!vattr[attrib].vbo_valid) {
+ fprintf(stderr, "%s: unavailable attrib: %d\n", __FUNCTION__, attrib);
+ return 0;
+ }
+
+ // local data copy is unavailable, grab the data from the vbo
+ Mesh *m = (Mesh*)this;
+ m->vattr[attrib].data.resize(nverts * vattr[attrib].nelem);
+
+ glBindBuffer(GL_ARRAY_BUFFER, vattr[attrib].vbo);
+ void *data = glMapBuffer(GL_ARRAY_BUFFER, GL_READ_ONLY);
+ memcpy(&m->vattr[attrib].data[0], data, nverts * vattr[attrib].nelem * sizeof(float));
+ glUnmapBuffer(GL_ARRAY_BUFFER);
+
+ vattr[attrib].data_valid = true;
+#endif
+ }
+
+ return &vattr[attrib].data[0];
+}
+
+void Mesh::set_attrib(int attrib, int idx, const Vec4 &v)
+{
+ float *data = get_attrib_data(attrib);
+ if(data) {
+ data += idx * vattr[attrib].nelem;
+ for(int i=0; i<vattr[attrib].nelem; i++) {
+ data[i] = v[i];
+ }
+ }
+}
+
+Vec4 Mesh::get_attrib(int attrib, int idx) const
+{
+ Vec4 v(0.0, 0.0, 0.0, 1.0);
+ const float *data = get_attrib_data(attrib);
+ if(data) {
+ data += idx * vattr[attrib].nelem;
+ for(int i=0; i<vattr[attrib].nelem; i++) {
+ v[i] = data[i];
+ }
+ }
+ return v;
+}
+
+int Mesh::get_attrib_count(int attrib) const
+{
+ return has_attrib(attrib) ? nverts : 0;
+}
+
+
+unsigned int *Mesh::set_index_data(int num, const unsigned int *indices)
+{
+ int nidx = nfaces * 3;
+ if(nidx && num != nidx) {
+ fprintf(stderr, "%s: index count mismatch (%d instead of %d)\n", __FUNCTION__, num, nidx);
+ return 0;
+ }
+ nfaces = num / 3;
+
+ idata.clear();
+ idata.resize(num);
+
+ if(indices) {
+ memcpy(&idata[0], indices, num * sizeof *indices);
+ }
+
+ idata_valid = true;
+ ibo_valid = false;
+
+ return &idata[0];
+}
+
+unsigned int *Mesh::get_index_data()
+{
+ ibo_valid = false;
+ return (unsigned int*)((const Mesh*)this)->get_index_data();
+}
+
+const unsigned int *Mesh::get_index_data() const
+{
+ if(!idata_valid) {
+#if GL_ES_VERSION_2_0
+ fprintf(stderr, "%s: can't read back index data in CrippledGL ES\n", __FUNCTION__);
+ return 0;
+#else
+ if(!ibo_valid) {
+ fprintf(stderr, "%s: indices unavailable\n", __FUNCTION__);
+ return 0;
+ }
+
+ // local data copy is unavailable, gram the data from the ibo
+ Mesh *m = (Mesh*)this;
+ int nidx = nfaces * 3;
+ m->idata.resize(nidx);
+
+ glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, ibo);
+ void *data = glMapBuffer(GL_ELEMENT_ARRAY_BUFFER, GL_READ_ONLY);
+ memcpy(&m->idata[0], data, nidx * sizeof(unsigned int));
+ glUnmapBuffer(GL_ELEMENT_ARRAY_BUFFER);
+
+ idata_valid = true;
+#endif
+ }
+
+ return &idata[0];
+}
+
+int Mesh::get_index_count() const
+{
+ return nfaces * 3;
+}
+
+void Mesh::append(const Mesh &mesh)
+{
+ unsigned int idxoffs = nverts;
+
+ if(!nverts) {
+ clone(mesh);
+ return;
+ }
+
+ nverts += mesh.nverts;
+ nfaces += mesh.nfaces;
+
+ for(int i=0; i<NUM_MESH_ATTR; i++) {
+ if(has_attrib(i) && mesh.has_attrib(i)) {
+ // force validating the data arrays
+ get_attrib_data(i);
+ mesh.get_attrib_data(i);
+
+ // append the mesh data
+ vattr[i].data.insert(vattr[i].data.end(), mesh.vattr[i].data.begin(), mesh.vattr[i].data.end());
+ }
+ }
+
+ if(ibo_valid || idata_valid) {
+ // make index arrays valid
+ get_index_data();
+ mesh.get_index_data();
+
+ size_t orig_sz = idata.size();
+
+ idata.insert(idata.end(), mesh.idata.begin(), mesh.idata.end());
+
+ // fixup all the new indices
+ for(size_t i=orig_sz; i<idata.size(); i++) {
+ idata[i] += idxoffs;
+ }
+ }
+
+ // fuck everything
+ wire_ibo_valid = false;
+ aabb_valid = false;
+ bsph_valid = false;
+}
+
+// assemble a complete vertex by adding all the useful attributes
+void Mesh::vertex(float x, float y, float z)
+{
+ cur_val[MESH_ATTR_VERTEX] = Vec4(x, y, z, 1.0f);
+ vattr[MESH_ATTR_VERTEX].data_valid = true;
+ vattr[MESH_ATTR_VERTEX].nelem = 3;
+
+ for(int i=0; i<NUM_MESH_ATTR; i++) {
+ if(vattr[i].data_valid) {
+ for(int j=0; j<vattr[MESH_ATTR_VERTEX].nelem; j++) {
+ vattr[i].data.push_back(cur_val[i][j]);
+ }
+ }
+ vattr[i].vbo_valid = false;
+ }
+
+ if(idata_valid) {
+ idata.clear();
+ }
+ ibo_valid = idata_valid = false;
+}
+
+void Mesh::normal(float nx, float ny, float nz)
+{
+ cur_val[MESH_ATTR_NORMAL] = Vec4(nx, ny, nz, 1.0f);
+ vattr[MESH_ATTR_NORMAL].data_valid = true;
+ vattr[MESH_ATTR_NORMAL].nelem = 3;
+}
+
+void Mesh::tangent(float tx, float ty, float tz)
+{
+ cur_val[MESH_ATTR_TANGENT] = Vec4(tx, ty, tz, 1.0f);
+ vattr[MESH_ATTR_TANGENT].data_valid = true;
+ vattr[MESH_ATTR_TANGENT].nelem = 3;
+}
+
+void Mesh::texcoord(float u, float v, float w)
+{
+ cur_val[MESH_ATTR_TEXCOORD] = Vec4(u, v, w, 1.0f);
+ vattr[MESH_ATTR_TEXCOORD].data_valid = true;
+ vattr[MESH_ATTR_TEXCOORD].nelem = 3;
+}
+
+void Mesh::boneweights(float w1, float w2, float w3, float w4)
+{
+ cur_val[MESH_ATTR_BONEWEIGHTS] = Vec4(w1, w2, w3, w4);
+ vattr[MESH_ATTR_BONEWEIGHTS].data_valid = true;
+ vattr[MESH_ATTR_BONEWEIGHTS].nelem = 4;
+}
+
+void Mesh::boneidx(int idx1, int idx2, int idx3, int idx4)
+{
+ cur_val[MESH_ATTR_BONEIDX] = Vec4(idx1, idx2, idx3, idx4);
+ vattr[MESH_ATTR_BONEIDX].data_valid = true;
+ vattr[MESH_ATTR_BONEIDX].nelem = 4;
+}
+
+int Mesh::get_poly_count() const
+{
+ if(nfaces) {
+ return nfaces;
+ }
+ if(nverts) {
+ return nverts / 3;
+ }
+ return 0;
+}
+
+/// static function
+void Mesh::set_attrib_location(int attr, int loc)
+{
+ if(attr < 0 || attr >= NUM_MESH_ATTR) {
+ return;
+ }
+ Mesh::global_sdr_loc[attr] = loc;
+}
+
+/// static function
+int Mesh::get_attrib_location(int attr)
+{
+ if(attr < 0 || attr >= NUM_MESH_ATTR) {
+ return -1;
+ }
+ return Mesh::global_sdr_loc[attr];
+}
+
+/// static function
+void Mesh::clear_attrib_locations()
+{
+ for(int i=0; i<NUM_MESH_ATTR; i++) {
+ Mesh::global_sdr_loc[i] = -1;
+ }
+}
+
+/// static function
+void Mesh::set_vis_vecsize(float sz)
+{
+ Mesh::vis_vecsize = sz;
+}
+
+float Mesh::get_vis_vecsize()
+{
+ return Mesh::vis_vecsize;
+}
+
+void Mesh::apply_xform(const Mat4 &xform)
+{
+ Mat4 dir_xform = xform.upper3x3();
+ apply_xform(xform, dir_xform);
+}
+
+void Mesh::apply_xform(const Mat4 &xform, const Mat4 &dir_xform)
+{
+ for(unsigned int i=0; i<nverts; i++) {
+ Vec4 v = get_attrib(MESH_ATTR_VERTEX, i);
+ set_attrib(MESH_ATTR_VERTEX, i, xform * v);
+
+ if(has_attrib(MESH_ATTR_NORMAL)) {
+ Vec3 n = Vec3(get_attrib(MESH_ATTR_NORMAL, i));
+ set_attrib(MESH_ATTR_NORMAL, i, Vec4(dir_xform * n));
+ }
+ if(has_attrib(MESH_ATTR_TANGENT)) {
+ Vec3 t = Vec3(get_attrib(MESH_ATTR_TANGENT, i));
+ set_attrib(MESH_ATTR_TANGENT, i, Vec4(dir_xform * t));
+ }
+ }
+}
+
+void Mesh::flip()
+{
+ flip_faces();
+ flip_normals();
+}
+
+void Mesh::flip_faces()
+{
+ if(is_indexed()) {
+ unsigned int *indices = get_index_data();
+ if(!indices) return;
+
+ int idxnum = get_index_count();
+ for(int i=0; i<idxnum; i+=3) {
+ unsigned int tmp = indices[i + 2];
+ indices[i + 2] = indices[i + 1];
+ indices[i + 1] = tmp;
+ }
+
+ } else {
+ Vec3 *verts = (Vec3*)get_attrib_data(MESH_ATTR_VERTEX);
+ if(!verts) return;
+
+ int vnum = get_attrib_count(MESH_ATTR_VERTEX);
+ for(int i=0; i<vnum; i+=3) {
+ Vec3 tmp = verts[i + 2];
+ verts[i + 2] = verts[i + 1];
+ verts[i + 1] = tmp;
+ }
+ }
+}
+
+void Mesh::flip_normals()
+{
+ Vec3 *normals = (Vec3*)get_attrib_data(MESH_ATTR_NORMAL);
+ if(!normals) return;
+
+ int num = get_attrib_count(MESH_ATTR_NORMAL);
+ for(int i=0; i<num; i++) {
+ normals[i] = -normals[i];
+ }
+}
+
+void Mesh::explode()
+{
+ if(!is_indexed()) return; // no vertex sharing is possible in unindexed meshes
+
+ unsigned int *indices = get_index_data();
+ assert(indices);
+
+ int idxnum = get_index_count();
+ int nnverts = idxnum;
+
+ nverts = nnverts;
+
+ for(int i=0; i<NUM_MESH_ATTR; i++) {
+ if(!has_attrib(i)) continue;
+
+ const float *srcbuf = get_attrib_data(i);
+
+ float *tmpbuf = new float[nnverts * vattr[i].nelem];
+ float *dstptr = tmpbuf;
+ for(int j=0; j<idxnum; j++) {
+ unsigned int idx = indices[j];
+ const float *srcptr = srcbuf + idx * vattr[i].nelem;
+
+ for(int k=0; k<vattr[i].nelem; k++) {
+ *dstptr++ = *srcptr++;
+ }
+ }
+ set_attrib_data(i, vattr[i].nelem, nnverts, tmpbuf);
+ delete [] tmpbuf;
+ }
+
+ ibo_valid = false;
+ idata_valid = false;
+ idata.clear();
+
+ nfaces = idxnum / 3;
+}
+
+void Mesh::calc_face_normals()
+{
+ const Vec3 *varr = (Vec3*)get_attrib_data(MESH_ATTR_VERTEX);
+ Vec3 *narr = (Vec3*)get_attrib_data(MESH_ATTR_NORMAL);
+ if(!varr) {
+ return;
+ }
+
+ if(is_indexed()) {
+ const unsigned int *idxarr = get_index_data();
+
+ for(unsigned int i=0; i<nfaces; i++) {
+ Triangle face(i, varr, idxarr);
+ face.calc_normal();
+
+ for(int j=0; j<3; j++) {
+ unsigned int idx = *idxarr++;
+ narr[idx] = face.normal;
+ }
+ }
+ } else {
+ // non-indexed
+ int nfaces = nverts / 3;
+
+ for(int i=0; i<nfaces; i++) {
+ Triangle face(varr[0], varr[1], varr[2]);
+ face.calc_normal();
+
+ narr[0] = narr[1] = narr[2] = face.normal;
+ varr += vattr[MESH_ATTR_VERTEX].nelem;
+ narr += vattr[MESH_ATTR_NORMAL].nelem;
+ }
+ }
+}
+
+/*
+int Mesh::add_bone(XFormNode *bone)
+{
+ int idx = bones.size();
+ bones.push_back(bone);
+ return idx;
+}
+
+const XFormNode *Mesh::get_bone(int idx) const
+{
+ if(idx < 0 || idx >= (int)bones.size()) {
+ return 0;
+ }
+ return bones[idx];
+}
+
+int Mesh::get_bones_count() const
+{
+ return (int)bones.size();
+}
+*/
+
+bool Mesh::pre_draw() const
+{
+ cur_sdr = 0;
+ glGetIntegerv(GL_CURRENT_PROGRAM, &cur_sdr);
+
+ ((Mesh*)this)->update_buffers();
+
+ if(!vattr[MESH_ATTR_VERTEX].vbo_valid) {
+ fprintf(stderr, "%s: invalid vertex buffer\n", __FUNCTION__);
+ return false;
+ }
+
+ if(cur_sdr && use_custom_sdr_attr) {
+ // rendering with shaders
+ if(global_sdr_loc[MESH_ATTR_VERTEX] == -1) {
+ fprintf(stderr, "%s: shader attribute location for vertices unset\n", __FUNCTION__);
+ return false;
+ }
+
+ for(int i=0; i<NUM_MESH_ATTR; i++) {
+ int loc = global_sdr_loc[i];
+ if(loc >= 0 && vattr[i].vbo_valid) {
+ glBindBuffer(GL_ARRAY_BUFFER, vattr[i].vbo);
+ glVertexAttribPointer(loc, vattr[i].nelem, GL_FLOAT, GL_FALSE, 0, 0);
+ glEnableVertexAttribArray(loc);
+ }
+ }
+ } else {
+#ifndef GL_ES_VERSION_2_0
+ // rendering with fixed-function (not available in GLES2)
+ glBindBuffer(GL_ARRAY_BUFFER, vattr[MESH_ATTR_VERTEX].vbo);
+ glVertexPointer(vattr[MESH_ATTR_VERTEX].nelem, GL_FLOAT, 0, 0);
+ glEnableClientState(GL_VERTEX_ARRAY);
+
+ if(vattr[MESH_ATTR_NORMAL].vbo_valid) {
+ glBindBuffer(GL_ARRAY_BUFFER, vattr[MESH_ATTR_NORMAL].vbo);
+ glNormalPointer(GL_FLOAT, 0, 0);
+ glEnableClientState(GL_NORMAL_ARRAY);
+ }
+ if(vattr[MESH_ATTR_TEXCOORD].vbo_valid) {
+ glBindBuffer(GL_ARRAY_BUFFER, vattr[MESH_ATTR_TEXCOORD].vbo);
+ glTexCoordPointer(vattr[MESH_ATTR_TEXCOORD].nelem, GL_FLOAT, 0, 0);
+ glEnableClientState(GL_TEXTURE_COORD_ARRAY);
+ }
+ if(vattr[MESH_ATTR_COLOR].vbo_valid) {
+ glBindBuffer(GL_ARRAY_BUFFER, vattr[MESH_ATTR_COLOR].vbo);
+ glColorPointer(vattr[MESH_ATTR_COLOR].nelem, GL_FLOAT, 0, 0);
+ glEnableClientState(GL_COLOR_ARRAY);
+ }
+ if(vattr[MESH_ATTR_TEXCOORD2].vbo_valid) {
+ glClientActiveTexture(GL_TEXTURE1);
+ glBindBuffer(GL_ARRAY_BUFFER, vattr[MESH_ATTR_TEXCOORD2].vbo);
+ glTexCoordPointer(vattr[MESH_ATTR_TEXCOORD2].nelem, GL_FLOAT, 0, 0);
+ glEnableClientState(GL_TEXTURE_COORD_ARRAY);
+ glClientActiveTexture(GL_TEXTURE0);
+ }
+#endif
+ }
+ glBindBuffer(GL_ARRAY_BUFFER, 0);
+
+ return true;
+}
+
+void Mesh::draw() const
+{
+ if(!pre_draw()) return;
+
+ if(ibo_valid) {
+ glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, ibo);
+ glDrawElements(GL_TRIANGLES, nfaces * 3, GL_UNSIGNED_INT, 0);
+ glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0);
+ } else {
+ glDrawArrays(GL_TRIANGLES, 0, nverts);
+ }
+
+ post_draw();
+}
+
+void Mesh::post_draw() const
+{
+ if(cur_sdr && use_custom_sdr_attr) {
+ // rendered with shaders
+ for(int i=0; i<NUM_MESH_ATTR; i++) {
+ int loc = global_sdr_loc[i];
+ if(loc >= 0 && vattr[i].vbo_valid) {
+ glDisableVertexAttribArray(loc);
+ }
+ }
+ } else {
+#ifndef GL_ES_VERSION_2_0
+ // rendered with fixed-function
+ glDisableClientState(GL_VERTEX_ARRAY);
+ if(vattr[MESH_ATTR_NORMAL].vbo_valid) {
+ glDisableClientState(GL_NORMAL_ARRAY);
+ }
+ if(vattr[MESH_ATTR_TEXCOORD].vbo_valid) {
+ glDisableClientState(GL_TEXTURE_COORD_ARRAY);
+ }
+ if(vattr[MESH_ATTR_COLOR].vbo_valid) {
+ glDisableClientState(GL_COLOR_ARRAY);
+ }
+ if(vattr[MESH_ATTR_TEXCOORD2].vbo_valid) {
+ glClientActiveTexture(GL_TEXTURE1);
+ glDisableClientState(GL_TEXTURE_COORD_ARRAY);
+ glClientActiveTexture(GL_TEXTURE0);
+ }
+#endif
+ }
+}
+
+void Mesh::draw_wire() const
+{
+ if(!pre_draw()) return;
+
+ ((Mesh*)this)->update_wire_ibo();
+
+ int num_faces = get_poly_count();
+ glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, wire_ibo);
+ glDrawElements(GL_LINES, num_faces * 6, GL_UNSIGNED_INT, 0);
+ glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0);
+
+ post_draw();
+}
+
+void Mesh::draw_vertices() const
+{
+ if(!pre_draw()) return;
+
+ glDrawArrays(GL_POINTS, 0, nverts);
+
+ post_draw();
+}
+
+void Mesh::draw_normals() const
+{
+#ifdef USE_OLDGL
+ int cur_sdr = 0;
+ glGetIntegerv(GL_CURRENT_PROGRAM, &cur_sdr);
+
+ Vec3 *varr = (Vec3*)get_attrib_data(MESH_ATTR_VERTEX);
+ Vec3 *norm = (Vec3*)get_attrib_data(MESH_ATTR_NORMAL);
+ if(!varr || !norm) {
+ return;
+ }
+
+ glBegin(GL_LINES);
+ if(cur_sdr && use_custom_sdr_attr) {
+ int vert_loc = global_sdr_loc[MESH_ATTR_VERTEX];
+ if(vert_loc < 0) {
+ glEnd();
+ return;
+ }
+
+ for(size_t i=0; i<nverts; i++) {
+ glVertexAttrib3f(vert_loc, varr[i].x, varr[i].y, varr[i].z);
+ Vec3 end = varr[i] + norm[i] * vis_vecsize;
+ glVertexAttrib3f(vert_loc, end.x, end.y, end.z);
+ }
+ } else {
+ for(size_t i=0; i<nverts; i++) {
+ glVertex3f(varr[i].x, varr[i].y, varr[i].z);
+ Vec3 end = varr[i] + norm[i] * vis_vecsize;
+ glVertex3f(end.x, end.y, end.z);
+ }
+ }
+ glEnd();
+#endif // USE_OLDGL
+}
+
+void Mesh::draw_tangents() const
+{
+#ifdef USE_OLDGL
+ int cur_sdr = 0;
+ glGetIntegerv(GL_CURRENT_PROGRAM, &cur_sdr);
+
+ Vec3 *varr = (Vec3*)get_attrib_data(MESH_ATTR_VERTEX);
+ Vec3 *tang = (Vec3*)get_attrib_data(MESH_ATTR_TANGENT);
+ if(!varr || !tang) {
+ return;
+ }
+
+ glBegin(GL_LINES);
+ if(cur_sdr && use_custom_sdr_attr) {
+ int vert_loc = global_sdr_loc[MESH_ATTR_VERTEX];
+ if(vert_loc < 0) {
+ glEnd();
+ return;
+ }
+
+ for(size_t i=0; i<nverts; i++) {
+ glVertexAttrib3f(vert_loc, varr[i].x, varr[i].y, varr[i].z);
+ Vec3 end = varr[i] + tang[i] * vis_vecsize;
+ glVertexAttrib3f(vert_loc, end.x, end.y, end.z);
+ }
+ } else {
+ for(size_t i=0; i<nverts; i++) {
+ glVertex3f(varr[i].x, varr[i].y, varr[i].z);
+ Vec3 end = varr[i] + tang[i] * vis_vecsize;
+ glVertex3f(end.x, end.y, end.z);
+ }
+ }
+ glEnd();
+#endif // USE_OLDGL
+}
+
+void Mesh::get_aabbox(Vec3 *vmin, Vec3 *vmax) const
+{
+ if(!aabb_valid) {
+ ((Mesh*)this)->calc_aabb();
+ }
+ *vmin = aabb.min;
+ *vmax = aabb.max;
+}
+
+const AABox &Mesh::get_aabbox() const
+{
+ if(!aabb_valid) {
+ ((Mesh*)this)->calc_aabb();
+ }
+ return aabb;
+}
+
+float Mesh::get_bsphere(Vec3 *center, float *rad) const
+{
+ if(!bsph_valid) {
+ ((Mesh*)this)->calc_bsph();
+ }
+ *center = bsph.center;
+ *rad = bsph.radius;
+ return bsph.radius;
+}
+
+const Sphere &Mesh::get_bsphere() const
+{
+ if(!bsph_valid) {
+ ((Mesh*)this)->calc_bsph();
+ }
+ return bsph;
+}
+
+/// static function
+void Mesh::set_intersect_mode(unsigned int mode)
+{
+ Mesh::intersect_mode = mode;
+}
+
+/// static function
+unsigned int Mesh::get_intersect_mode()
+{
+ return Mesh::intersect_mode;
+}
+
+/// static function
+void Mesh::set_vertex_select_distance(float dist)
+{
+ Mesh::vertex_sel_dist = dist;
+}
+
+/// static function
+float Mesh::get_vertex_select_distance()
+{
+ return Mesh::vertex_sel_dist;
+}
+
+bool Mesh::intersect(const Ray &ray, HitPoint *hit) const
+{
+ assert((Mesh::intersect_mode & (ISECT_VERTICES | ISECT_FACE)) != (ISECT_VERTICES | ISECT_FACE));
+
+ const Vec3 *varr = (Vec3*)get_attrib_data(MESH_ATTR_VERTEX);
+ const Vec3 *narr = (Vec3*)get_attrib_data(MESH_ATTR_NORMAL);
+ if(!varr) {
+ return false;
+ }
+ const unsigned int *idxarr = get_index_data();
+
+ // first test with the bounding box
+ AABox box;
+ get_aabbox(&box.min, &box.max);
+ if(!box.intersect(ray)) {
+ return false;
+ }
+
+ HitPoint nearest_hit;
+ nearest_hit.dist = FLT_MAX;
+ nearest_hit.data = 0;
+
+ if(Mesh::intersect_mode & ISECT_VERTICES) {
+ // we asked for "intersections" with the vertices of the mesh
+ long nearest_vidx = -1;
+ float thres_sq = Mesh::vertex_sel_dist * Mesh::vertex_sel_dist;
+
+ for(unsigned int i=0; i<nverts; i++) {
+
+ if((Mesh::intersect_mode & ISECT_FRONT) && dot(narr[i], ray.dir) > 0) {
+ continue;
+ }
+
+ // project the vertex onto the ray line
+ float t = dot(varr[i] - ray.origin, ray.dir);
+ Vec3 vproj = ray.origin + ray.dir * t;
+
+ float dist_sq = length_sq(vproj - varr[i]);
+ if(dist_sq < thres_sq) {
+ if(!hit) {
+ return true;
+ }
+ if(t < nearest_hit.dist) {
+ nearest_hit.dist = t;
+ nearest_vidx = i;
+ }
+ }
+ }
+
+ if(nearest_vidx != -1) {
+ hitvert = varr[nearest_vidx];
+ nearest_hit.data = &hitvert;
+ }
+
+ } else {
+ // regular intersection test with polygons
+
+ for(unsigned int i=0; i<nfaces; i++) {
+ Triangle face(i, varr, idxarr);
+
+ // ignore back-facing polygons if the mode flags include ISECT_FRONT
+ if((Mesh::intersect_mode & ISECT_FRONT) && dot(face.get_normal(), ray.dir) > 0) {
+ continue;
+ }
+
+ HitPoint fhit;
+ if(face.intersect(ray, hit ? &fhit : 0)) {
+ if(!hit) {
+ return true;
+ }
+ if(fhit.dist < nearest_hit.dist) {
+ nearest_hit = fhit;
+ hitface = face;
+ }
+ }
+ }
+ }
+
+ if(nearest_hit.data) {
+ if(hit) {
+ *hit = nearest_hit;
+
+ // if we are interested in the mesh and not the faces set obj to this
+ if(Mesh::intersect_mode & ISECT_FACE) {
+ hit->data = &hitface;
+ } else if(Mesh::intersect_mode & ISECT_VERTICES) {
+ hit->data = &hitvert;
+ } else {
+ hit->data = (void*)this;
+ }
+ }
+ return true;
+ }
+ return false;
+}
+
+
+// texture coordinate manipulation
+void Mesh::texcoord_apply_xform(const Mat4 &xform)
+{
+ if(!has_attrib(MESH_ATTR_TEXCOORD)) {
+ return;
+ }
+
+ for(unsigned int i=0; i<nverts; i++) {
+ Vec4 tc = get_attrib(MESH_ATTR_TEXCOORD, i);
+ set_attrib(MESH_ATTR_TEXCOORD, i, xform * tc);
+ }
+}
+
+void Mesh::texcoord_gen_plane(const Vec3 &norm, const Vec3 &tang)
+{
+ if(!nverts) return;
+
+ if(!has_attrib(MESH_ATTR_TEXCOORD)) {
+ // allocate texture coordinate attribute array
+ set_attrib_data(MESH_ATTR_TEXCOORD, 2, nverts);
+ }
+
+ Vec3 n = normalize(norm);
+ Vec3 b = normalize(cross(n, tang));
+ Vec3 t = cross(b, n);
+
+ for(unsigned int i=0; i<nverts; i++) {
+ Vec3 pos = Vec3(get_attrib(MESH_ATTR_VERTEX, i));
+
+ // distance along the tangent direction
+ float u = dot(pos, t);
+ // distance along the bitangent direction
+ float v = dot(pos, b);
+
+ set_attrib(MESH_ATTR_TEXCOORD, i, Vec4(u, v, 0, 1));
+ }
+}
+
+void Mesh::texcoord_gen_box()
+{
+ if(!nverts || !has_attrib(MESH_ATTR_NORMAL)) return;
+
+ if(!has_attrib(MESH_ATTR_TEXCOORD)) {
+ // allocate texture coordinate attribute array
+ set_attrib_data(MESH_ATTR_TEXCOORD, 2, nverts);
+ }
+
+ for(unsigned int i=0; i<nverts; i++) {
+ Vec3 pos = Vec3(get_attrib(MESH_ATTR_VERTEX, i)) * 0.5 + Vec3(0.5, 0.5, 0.5);
+ Vec3 norm = Vec3(get_attrib(MESH_ATTR_NORMAL, i));
+
+ float abs_nx = fabs(norm.x);
+ float abs_ny = fabs(norm.y);
+ float abs_nz = fabs(norm.z);
+ int dom = abs_nx > abs_ny && abs_nx > abs_nz ? 0 : (abs_ny > abs_nz ? 1 : 2);
+
+ float uv[2], *uvptr = uv;
+ for(int j=0; j<3; j++) {
+ if(j == dom) continue; // skip dominant axis
+
+ *uvptr++ = pos[j];
+ }
+ set_attrib(MESH_ATTR_TEXCOORD, i, Vec4(uv[0], uv[1], 0, 1));
+ }
+}
+
+void Mesh::texcoord_gen_cylinder()
+{
+ if(!nverts) return;
+
+ if(!has_attrib(MESH_ATTR_TEXCOORD)) {
+ // allocate texture coordinate attribute array
+ set_attrib_data(MESH_ATTR_TEXCOORD, 2, nverts);
+ }
+
+ for(unsigned int i=0; i<nverts; i++) {
+ Vec3 pos = Vec3(get_attrib(MESH_ATTR_VERTEX, i));
+
+ float rho = sqrt(pos.x * pos.x + pos.z * pos.z);
+ float theta = rho == 0.0 ? 0.0 : atan2(pos.z / rho, pos.x / rho);
+
+ float u = theta / (2.0 * M_PI) + 0.5;
+ float v = pos.y;
+
+ set_attrib(MESH_ATTR_TEXCOORD, i, Vec4(u, v, 0, 1));
+ }
+}
+
+
+bool Mesh::dump(const char *fname) const
+{
+ FILE *fp = fopen(fname, "wb");
+ if(fp) {
+ bool res = dump(fp);
+ fclose(fp);
+ return res;
+ }
+ return false;
+}
+
+bool Mesh::dump(FILE *fp) const
+{
+ if(!has_attrib(MESH_ATTR_VERTEX)) {
+ return false;
+ }
+
+ fprintf(fp, "VERTEX ATTRIBUTES\n");
+ static const char *label[] = { "pos", "nor", "tan", "tex", "col", "bw", "bid", "tex2" };
+ static const char *elemfmt[] = { 0, " %s(%g)", " %s(%g, %g)", " %s(%g, %g, %g)", " %s(%g, %g, %g, %g)", 0 };
+
+ for(int i=0; i<(int)nverts; i++) {
+ fprintf(fp, "%5u:", i);
+ for(int j=0; j<NUM_MESH_ATTR; j++) {
+ if(has_attrib(j)) {
+ Vec4 v = get_attrib(j, i);
+ int nelem = vattr[j].nelem;
+ fprintf(fp, elemfmt[nelem], label[j], v.x, v.y, v.z, v.w);
+ }
+ }
+ fputc('\n', fp);
+ }
+
+ if(is_indexed()) {
+ const unsigned int *idx = get_index_data();
+ int numidx = get_index_count();
+ int numtri = numidx / 3;
+ assert(numidx % 3 == 0);
+
+ fprintf(fp, "FACES\n");
+
+ for(int i=0; i<numtri; i++) {
+ fprintf(fp, "%5d: %d %d %d\n", i, idx[0], idx[1], idx[2]);
+ idx += 3;
+ }
+ }
+ return true;
+}
+
+bool Mesh::dump_obj(const char *fname) const
+{
+ FILE *fp = fopen(fname, "wb");
+ if(fp) {
+ bool res = dump_obj(fp);
+ fclose(fp);
+ return res;
+ }
+ return false;
+}
+
+bool Mesh::dump_obj(FILE *fp, int voffs) const
+{
+ if(!has_attrib(MESH_ATTR_VERTEX)) {
+ return false;
+ }
+
+ for(int i=0; i<(int)nverts; i++) {
+ Vec4 v = get_attrib(MESH_ATTR_VERTEX, i);
+ fprintf(fp, "v %f %f %f\n", v.x, v.y, v.z);
+ }
+
+ if(has_attrib(MESH_ATTR_NORMAL)) {
+ for(int i=0; i<(int)nverts; i++) {
+ Vec4 v = get_attrib(MESH_ATTR_NORMAL, i);
+ fprintf(fp, "vn %f %f %f\n", v.x, v.y, v.z);
+ }
+ }
+
+ if(has_attrib(MESH_ATTR_TEXCOORD)) {
+ for(int i=0; i<(int)nverts; i++) {
+ Vec4 v = get_attrib(MESH_ATTR_TEXCOORD, i);
+ fprintf(fp, "vt %f %f\n", v.x, v.y);
+ }
+ }
+
+ if(is_indexed()) {
+ const unsigned int *idxptr = get_index_data();
+ int numidx = get_index_count();
+ int numtri = numidx / 3;
+ assert(numidx % 3 == 0);
+
+ for(int i=0; i<numtri; i++) {
+ fputc('f', fp);
+ for(int j=0; j<3; j++) {
+ unsigned int idx = *idxptr++ + 1 + voffs;
+ fprintf(fp, " %u/%u/%u", idx, idx, idx);
+ }
+ fputc('\n', fp);
+ }
+ } else {
+ int numtri = nverts / 3;
+ unsigned int idx = 1 + voffs;
+ for(int i=0; i<numtri; i++) {
+ fputc('f', fp);
+ for(int j=0; j<3; j++) {
+ fprintf(fp, " %u/%u/%u", idx, idx, idx);
+ ++idx;
+ }
+ fputc('\n', fp);
+ }
+ }
+ return true;
+}
+
+// ------ private member functions ------
+
+void Mesh::calc_aabb()
+{
+ // the cast is to force calling the const version which doesn't invalidate
+ if(!((const Mesh*)this)->get_attrib_data(MESH_ATTR_VERTEX)) {
+ return;
+ }
+
+ aabb.min = Vec3(FLT_MAX, FLT_MAX, FLT_MAX);
+ aabb.max = -aabb.min;
+
+ for(unsigned int i=0; i<nverts; i++) {
+ Vec4 v = get_attrib(MESH_ATTR_VERTEX, i);
+ for(int j=0; j<3; j++) {
+ if(v[j] < aabb.min[j]) {
+ aabb.min[j] = v[j];
+ }
+ if(v[j] > aabb.max[j]) {
+ aabb.max[j] = v[j];
+ }
+ }
+ }
+ aabb_valid = true;
+}
+
+void Mesh::calc_bsph()
+{
+ // the cast is to force calling the const version which doesn't invalidate
+ if(!((const Mesh*)this)->get_attrib_data(MESH_ATTR_VERTEX)) {
+ return;
+ }
+
+ Vec3 v;
+ bsph.center = Vec3(0, 0, 0);
+
+ // first find the center
+ for(unsigned int i=0; i<nverts; i++) {
+ v = Vec3(get_attrib(MESH_ATTR_VERTEX, i));
+ bsph.center += v;
+ }
+ bsph.center /= (float)nverts;
+
+ bsph.radius = 0.0f;
+ for(unsigned int i=0; i<nverts; i++) {
+ v = Vec3(get_attrib(MESH_ATTR_VERTEX, i));
+ float dist_sq = length_sq(v - bsph.center);
+ if(dist_sq > bsph.radius) {
+ bsph.radius = dist_sq;
+ }
+ }
+ bsph.radius = sqrt(bsph.radius);
+
+ bsph_valid = true;
+}
+
+void Mesh::update_buffers()
+{
+ for(int i=0; i<NUM_MESH_ATTR; i++) {
+ if(has_attrib(i) && !vattr[i].vbo_valid) {
+ glBindBuffer(GL_ARRAY_BUFFER, vattr[i].vbo);
+ glBufferData(GL_ARRAY_BUFFER, nverts * vattr[i].nelem * sizeof(float), &vattr[i].data[0], GL_STATIC_DRAW);
+ vattr[i].vbo_valid = true;
+ }
+ }
+ glBindBuffer(GL_ARRAY_BUFFER, 0);
+
+ if(idata_valid && !ibo_valid) {
+ glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, ibo);
+ glBufferData(GL_ELEMENT_ARRAY_BUFFER, nfaces * 3 * sizeof(unsigned int), &idata[0], GL_STATIC_DRAW);
+ ibo_valid = true;
+ }
+ glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0);
+}
+
+void Mesh::update_wire_ibo()
+{
+ update_buffers();
+
+ if(wire_ibo_valid) {
+ return;
+ }
+
+ if(!wire_ibo) {
+ glGenBuffers(1, &wire_ibo);
+ }
+
+ int num_faces = get_poly_count();
+
+ unsigned int *wire_idxarr = new unsigned int[num_faces * 6];
+ unsigned int *dest = wire_idxarr;
+
+ if(ibo_valid) {
+ // we're dealing with an indexed mesh
+ const unsigned int *idxarr = ((const Mesh*)this)->get_index_data();
+
+ for(int i=0; i<num_faces; i++) {
+ *dest++ = idxarr[0];
+ *dest++ = idxarr[1];
+ *dest++ = idxarr[1];
+ *dest++ = idxarr[2];
+ *dest++ = idxarr[2];
+ *dest++ = idxarr[0];
+ idxarr += 3;
+ }
+ } else {
+ // not an indexed mesh ...
+ for(int i=0; i<num_faces; i++) {
+ int vidx = i * 3;
+ *dest++ = vidx;
+ *dest++ = vidx + 1;
+ *dest++ = vidx + 1;
+ *dest++ = vidx + 2;
+ *dest++ = vidx + 2;
+ *dest++ = vidx;
+ }
+ }
+
+ glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, wire_ibo);
+ glBufferData(GL_ELEMENT_ARRAY_BUFFER, num_faces * 6 * sizeof(unsigned int), wire_idxarr, GL_STATIC_DRAW);
+ delete [] wire_idxarr;
+ wire_ibo_valid = true;
+ glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0);
+}
+
+
+// ------ class Triangle ------
+Triangle::Triangle()
+{
+ normal_valid = false;
+ id = -1;
+}
+
+Triangle::Triangle(const Vec3 &v0, const Vec3 &v1, const Vec3 &v2)
+{
+ v[0] = v0;
+ v[1] = v1;
+ v[2] = v2;
+ normal_valid = false;
+ id = -1;
+}
+
+Triangle::Triangle(int n, const Vec3 *varr, const unsigned int *idxarr)
+{
+ if(idxarr) {
+ v[0] = varr[idxarr[n * 3]];
+ v[1] = varr[idxarr[n * 3 + 1]];
+ v[2] = varr[idxarr[n * 3 + 2]];
+ } else {
+ v[0] = varr[n * 3];
+ v[1] = varr[n * 3 + 1];
+ v[2] = varr[n * 3 + 2];
+ }
+ normal_valid = false;
+ id = n;
+}
+
+void Triangle::calc_normal()
+{
+ normal = normalize(cross(v[1] - v[0], v[2] - v[0]));
+ normal_valid = true;
+}
+
+const Vec3 &Triangle::get_normal() const
+{
+ if(!normal_valid) {
+ ((Triangle*)this)->calc_normal();
+ }
+ return normal;
+}
+
+void Triangle::transform(const Mat4 &xform)
+{
+ v[0] = xform * v[0];
+ v[1] = xform * v[1];
+ v[2] = xform * v[2];
+ normal_valid = false;
+}
+
+void Triangle::draw() const
+{
+ Vec3 n[3];
+ n[0] = n[1] = n[2] = get_normal();
+
+ int vloc = Mesh::get_attrib_location(MESH_ATTR_VERTEX);
+ int nloc = Mesh::get_attrib_location(MESH_ATTR_NORMAL);
+
+ glEnableVertexAttribArray(vloc);
+ glVertexAttribPointer(vloc, 3, GL_FLOAT, GL_FALSE, 0, &v[0].x);
+ glVertexAttribPointer(nloc, 3, GL_FLOAT, GL_FALSE, 0, &n[0].x);
+
+ glDrawArrays(GL_TRIANGLES, 0, 3);
+
+ glDisableVertexAttribArray(vloc);
+ glDisableVertexAttribArray(nloc);
+}
+
+void Triangle::draw_wire() const
+{
+ static const int idxarr[] = {0, 1, 1, 2, 2, 0};
+ int vloc = Mesh::get_attrib_location(MESH_ATTR_VERTEX);
+
+ glEnableVertexAttribArray(vloc);
+ glVertexAttribPointer(vloc, 3, GL_FLOAT, GL_FALSE, 0, &v[0].x);
+
+ glDrawElements(GL_LINES, 6, GL_UNSIGNED_INT, idxarr);
+
+ glDisableVertexAttribArray(vloc);
+}
+
+Vec3 Triangle::calc_barycentric(const Vec3 &pos) const
+{
+ Vec3 norm = get_normal();
+
+ float area_sq = fabs(dot(cross(v[1] - v[0], v[2] - v[0]), norm));
+ if(area_sq < 1e-5) {
+ return Vec3(0, 0, 0);
+ }
+
+ float asq0 = fabs(dot(cross(v[1] - pos, v[2] - pos), norm));
+ float asq1 = fabs(dot(cross(v[2] - pos, v[0] - pos), norm));
+ float asq2 = fabs(dot(cross(v[0] - pos, v[1] - pos), norm));
+
+ return Vec3(asq0 / area_sq, asq1 / area_sq, asq2 / area_sq);
+}
+
+bool Triangle::intersect(const Ray &ray, HitPoint *hit) const
+{
+ Vec3 normal = get_normal();
+
+ float ndotdir = dot(ray.dir, normal);
+ if(fabs(ndotdir) < 1e-4) {
+ return false;
+ }
+
+ Vec3 vertdir = v[0] - ray.origin;
+ float t = dot(normal, vertdir) / ndotdir;
+
+ Vec3 pos = ray.origin + ray.dir * t;
+ Vec3 bary = calc_barycentric(pos);
+
+ if(bary.x + bary.y + bary.z > 1.00001) {
+ return false;
+ }
+
+ if(hit) {
+ hit->dist = t;
+ hit->pos = ray.origin + ray.dir * t;
+ hit->normal = normal;
+ hit->data = (void*)this;
+ }
+ return true;
+}
projects / ld42_outofspace / commitdiff