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annotate src/zscn.cc @ 0:dc1723a8bf6f

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initial import
author John Tsiombikas <nuclear@member.fsf.org>
date Fri, 04 Mar 2011 06:51:16 +0200
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nuclear@0 1 #include <list>
nuclear@0 2 #include "zscn.h"
nuclear@0 3
nuclear@0 4 struct Face {
nuclear@0 5 Vector3 v[3];
nuclear@0 6 Vector3 n[3];
nuclear@0 7 Vector2 t[3];
nuclear@0 8
nuclear@0 9 const henge::Material *mat;
nuclear@0 10
nuclear@0 11 Face()
nuclear@0 12 {
nuclear@0 13 memset(this, 0, sizeof(Face));
nuclear@0 14 }
nuclear@0 15 };
nuclear@0 16
nuclear@0 17 static void proc_mesh(std::list<Face> *facelist, const henge::TriMesh *mesh,
nuclear@0 18 const henge::Material *mat, const Matrix4x4 &xform);
nuclear@0 19 static bool operator <(const Face &a, const Face &b);
nuclear@0 20
nuclear@0 21 ZScene::~ZScene()
nuclear@0 22 {
nuclear@0 23 }
nuclear@0 24
nuclear@0 25 void ZScene::render(unsigned int msec) const
nuclear@0 26 {
nuclear@0 27 setup_lights(msec);
nuclear@0 28
nuclear@0 29 glMatrixMode(GL_MODELVIEW);
nuclear@0 30
nuclear@0 31 Matrix4x4 view_mat;
nuclear@0 32 henge::store_matrix(&view_mat);
nuclear@0 33
nuclear@0 34 std::list<Face> facelist;
nuclear@0 35
nuclear@0 36 for(size_t i=0; i<objects.size(); i++) {
nuclear@0 37 const henge::RObject *obj = objects[i];
nuclear@0 38 Matrix4x4 xform = obj->get_xform_matrix(msec) * view_mat;
nuclear@0 39
nuclear@0 40 const henge::Material *mat = ((henge::RObject*)obj)->get_material_ptr();
nuclear@0 41 const henge::TriMesh *mesh = obj->get_mesh();
nuclear@0 42
nuclear@0 43 proc_mesh(&facelist, mesh, mat, xform);
nuclear@0 44 }
nuclear@0 45
nuclear@0 46 facelist.sort();
nuclear@0 47
nuclear@0 48 glPushAttrib(GL_ENABLE_BIT);
nuclear@0 49 glDisable(GL_DEPTH_TEST);
nuclear@0 50
nuclear@0 51 glPushMatrix();
nuclear@0 52 glLoadIdentity();
nuclear@0 53
nuclear@0 54 glBegin(GL_TRIANGLES);
nuclear@0 55
nuclear@0 56 const henge::Material *cur_mat = 0;
nuclear@0 57 std::list<Face>::iterator face = facelist.begin();
nuclear@0 58 while(face != facelist.end()) {
nuclear@0 59 if(face->mat != cur_mat) {
nuclear@0 60 glEnd();
nuclear@0 61
nuclear@0 62 face->mat->bind();
nuclear@0 63 cur_mat = face->mat;
nuclear@0 64
nuclear@0 65 glBegin(GL_TRIANGLES);
nuclear@0 66 }
nuclear@0 67
nuclear@0 68 for(int i=0; i<3; i++) {
nuclear@0 69 glNormal3f(face->n[i].x, face->n[i].y, face->n[i].z);
nuclear@0 70 glTexCoord2f(face->t[i].x, face->t[i].y);
nuclear@0 71 glVertex3f(face->v[i].x, face->v[i].y, face->v[i].z);
nuclear@0 72 }
nuclear@0 73
nuclear@0 74 face++;
nuclear@0 75 }
nuclear@0 76 glEnd();
nuclear@0 77
nuclear@0 78 glMatrixMode(GL_MODELVIEW);
nuclear@0 79 glPopMatrix();
nuclear@0 80 glPopAttrib();
nuclear@0 81 }
nuclear@0 82
nuclear@0 83 static void proc_mesh(std::list<Face> *facelist, const henge::TriMesh *mesh,
nuclear@0 84 const henge::Material *mat, const Matrix4x4 &xform)
nuclear@0 85 {
nuclear@0 86 Matrix3x3 norm_xform = xform;
nuclear@0 87
nuclear@0 88 const Vector3 *vert = mesh->get_data_vec3(henge::EL_VERTEX);
nuclear@0 89 const Vector3 *norm = mesh->get_data_vec3(henge::EL_NORMAL);
nuclear@0 90 const Vector2 *tc = mesh->get_data_vec2(henge::EL_TEXCOORD);
nuclear@0 91 const unsigned int *index = mesh->get_data_int(henge::EL_INDEX);
nuclear@0 92
nuclear@0 93 int nvert = mesh->get_count(henge::EL_VERTEX);
nuclear@0 94 int nindex = mesh->get_count(henge::EL_INDEX);
nuclear@0 95
nuclear@0 96 if(!vert || !nvert) {
nuclear@0 97 return;
nuclear@0 98 }
nuclear@0 99
nuclear@0 100 int face_count = (index ? nindex : nvert) / 3;
nuclear@0 101
nuclear@0 102 for(int i=0; i<face_count; i++) {
nuclear@0 103 Face face;
nuclear@0 104
nuclear@0 105 for(int j=0; j<3; j++) {
nuclear@0 106 int idx = index ? index[i * 3 + j] : i * 3 + j;
nuclear@0 107
nuclear@0 108 if(norm) {
nuclear@0 109 face.n[j] = norm[idx].transformed(norm_xform);
nuclear@0 110 }
nuclear@0 111 if(tc) {
nuclear@0 112 face.t[j] = tc[idx];
nuclear@0 113 }
nuclear@0 114 if(vert) {
nuclear@0 115 face.v[j] = vert[idx].transformed(xform);
nuclear@0 116 }
nuclear@0 117 }
nuclear@0 118
nuclear@0 119 face.mat = mat;
nuclear@0 120 facelist->push_back(face);
nuclear@0 121 }
nuclear@0 122 }
nuclear@0 123
nuclear@0 124 static bool operator <(const Face &a, const Face &b)
nuclear@0 125 {
nuclear@0 126 return (a.v[0].z + a.v[1].z + a.v[2].z) < (b.v[0].z + b.v[1].z + b.v[2].z);
nuclear@0 127 }