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- Committer: Alexandros Frantzis
- Date: 2010-07-07 10:32:18 UTC
- Revision ID: git-v1:d2683504fc3cc84e7f3aefd917147037706cecf0
Initial release of original OpenGL code.
- files added:
- data
- data/models
- data/shaders
- data/textures
added
removed
mesh.cpp
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#include "mesh.h"
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Texel::Texel()
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{
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u = 0; v = 0;
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}
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Texel::Texel(GLfloat pU, GLfloat pV)
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{
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u = pU; v = pV;
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}
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Mesh::Mesh()
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{
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mPolygonQty = 0;
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mVertexQty = 0;
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mMode = GL_QUADS;
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mVertex = 0;
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}
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Mesh::~Mesh()
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{
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delete [] mVertex;
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glDeleteLists(1, mBuildList);
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//deleteArray
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}
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void Mesh::make_cube()
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{
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mPolygonQty = 6;
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mVertexQty = 4 * mPolygonQty;
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mMode = GL_QUADS;
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mVertex = new Vertex[mVertexQty];
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mVertex[0].v = Vector3f( 1.0f, 1.0f,-1.0f);
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mVertex[1].v = Vector3f(-1.0f, 1.0f,-1.0f);
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mVertex[2].v = Vector3f(-1.0f, 1.0f, 1.0f);
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mVertex[3].v = Vector3f( 1.0f, 1.0f, 1.0f);
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mVertex[4].v = Vector3f( 1.0f,-1.0f, 1.0f);
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mVertex[5].v = Vector3f(-1.0f,-1.0f, 1.0f);
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mVertex[6].v = Vector3f(-1.0f,-1.0f,-1.0f);
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mVertex[7].v = Vector3f( 1.0f,-1.0f,-1.0f);
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mVertex[8].v = Vector3f( 1.0f, 1.0f, 1.0f);
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mVertex[9].v = Vector3f(-1.0f, 1.0f, 1.0f);
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mVertex[10].v = Vector3f(-1.0f,-1.0f, 1.0f);
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mVertex[11].v = Vector3f( 1.0f,-1.0f, 1.0f);
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mVertex[12].v = Vector3f( 1.0f,-1.0f,-1.0f);
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mVertex[13].v = Vector3f(-1.0f,-1.0f,-1.0f);
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mVertex[14].v = Vector3f(-1.0f, 1.0f,-1.0f);
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mVertex[15].v = Vector3f( 1.0f, 1.0f,-1.0f);
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mVertex[16].v = Vector3f(-1.0f, 1.0f, 1.0f);
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mVertex[17].v = Vector3f(-1.0f, 1.0f,-1.0f);
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mVertex[18].v = Vector3f(-1.0f,-1.0f,-1.0f);
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mVertex[19].v = Vector3f(-1.0f,-1.0f, 1.0f);
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mVertex[20].v = Vector3f(-1.0f, 1.0f, 1.0f);
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mVertex[21].v = Vector3f(-1.0f, 1.0f,-1.0f);
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mVertex[22].v = Vector3f(-1.0f,-1.0f,-1.0f);
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mVertex[23].v = Vector3f(-1.0f,-1.0f, 1.0f);
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for(unsigned i = 0; i < mVertexQty / 4; i += 4)
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{
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Vector3f n;
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n = normal(mVertex[i].v, mVertex[i + 1].v, mVertex[i + 2].v);
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for(unsigned j = 0; j < 4; j++)
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mVertex[i + j].n = n;
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mVertex[i + 0].t = Texel(0.0f, 0.0f);
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mVertex[i + 1].t = Texel(1.0f, 0.0f);
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mVertex[i + 2].t = Texel(1.0f, 1.0f);
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mVertex[i + 3].t = Texel(0.0f, 1.0f);
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}
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}
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void Mesh::make_torus()
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{
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unsigned wraps_qty = 64;
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unsigned per_wrap_qty = 64;
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float major_radius = 0.8;
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float minor_radius = 0.4;
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unsigned i, j;
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unsigned k = 0;
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Vector3f a, b, c, d, n;
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mMode = GL_TRIANGLES;
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mVertexQty = wraps_qty * per_wrap_qty * 6;
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mVertex = new Vertex[mVertexQty];
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for(i = 0; i < wraps_qty; i++)
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for(j = 0; j < per_wrap_qty; j++)
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{
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float wrap_frac = j / (float)per_wrap_qty;
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float phi = 2 * M_PI * wrap_frac;
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float theta = 2 * M_PI * (i + wrap_frac) / (float)wraps_qty;
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float r = major_radius + minor_radius * (float)cos(phi);
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a.x = (float)sin(theta) * r;
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a.y = minor_radius * (float)sin(phi);
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a.z = (float)cos(theta) * r;
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theta = 2 * M_PI * (i + wrap_frac + 1) / (float)wraps_qty;
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b.x = (float)sin(theta) * r;
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b.y = minor_radius * (float)sin(phi);
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b.z = (float)cos(theta) * r;
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wrap_frac = (j + 1) / (float)per_wrap_qty;
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phi = 2 * M_PI * wrap_frac;
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theta = 2 * M_PI * (i + wrap_frac) / (float)wraps_qty;
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r = major_radius + minor_radius * (float)cos(phi);
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c.x = (float)sin(theta) * r;
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c.y = minor_radius * (float)sin(phi);
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c.z = (float)cos(theta) * r;
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theta = 2 * M_PI * (i + wrap_frac + 1) / (float)wraps_qty;
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d.x = (float)sin(theta) * r;
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d.y = minor_radius * (float)sin(phi);
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d.z = (float)cos(theta) * r;
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n = normal(a, b, c);
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mVertex[k].n = n; mVertex[k].v = a; k++;
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mVertex[k].n = n; mVertex[k].v = b; k++;
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mVertex[k].n = n; mVertex[k].v = c; k++;
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n = normal(a, b, c);
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mVertex[k].n = n; mVertex[k].v = b; k++;
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mVertex[k].n = n; mVertex[k].v = c; k++;
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mVertex[k].n = n; mVertex[k].v = d; k++;
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}
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}
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void Mesh::render()
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{
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glBegin(mMode);
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glColor3f(1.0f, 0.0f, 0.0f);
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for(unsigned i = 0; i < mVertexQty; i++)
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{
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glNormal3f(mVertex[i].n.x, mVertex[i].n.y, mVertex[i].n.z);
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glTexCoord2f(mVertex[i].t.u, mVertex[i].t.v);
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glVertex3f(mVertex[i].v.x, mVertex[i].v.y, mVertex[i].v.z);
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}
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glEnd();
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}
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void Mesh::render_array()
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{
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glEnableClientState(GL_VERTEX_ARRAY);
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glEnableClientState(GL_NORMAL_ARRAY);
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glVertexPointer(3, GL_FLOAT, sizeof(Vertex), &mVertex[0].v.x);
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glNormalPointer(GL_FLOAT, sizeof(Vertex), &mVertex[0].n.x);
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glDrawArrays(mMode, 0, mVertexQty);
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glDisableClientState(GL_VERTEX_ARRAY);
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glDisableClientState(GL_NORMAL_ARRAY);
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}
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void Mesh::build_list()
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{
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#ifdef _DEBUG
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printf("Building list for mesh... ");
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#endif
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mBuildList = glGenLists(1);
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glNewList(mBuildList, GL_COMPILE);
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render();
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glEndList();
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#ifdef _DEBUG
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printf("[ Done ]\n");
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#endif
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}
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void Mesh::build_vbo()
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{
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#ifdef _DEBUG
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printf("Building vbo for mesh... ");
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#endif
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Vector3f *vertex;
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Texel *texel;
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Vector3f *normal;
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vertex = new Vector3f[mVertexQty];
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texel = new Texel[mVertexQty];
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normal = new Vector3f[mVertexQty];
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for(unsigned i = 0; i < mVertexQty; i++)
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{
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vertex[i] = mVertex[i].v;
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texel[i] = mVertex[i].t;
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normal[i] = mVertex[i].n;
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}
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// Generate And Bind The Vertex Buffer
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glGenBuffersARB(1, &mVBOVertices); // Get A Valid Name
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glBindBufferARB(GL_ARRAY_BUFFER_ARB, mVBOVertices); // Bind The Buffer
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// Load The Data
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glBufferDataARB(GL_ARRAY_BUFFER_ARB, mVertexQty * sizeof(Vector3f), vertex, GL_STATIC_DRAW_ARB);
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// Generate And Bind The normal Buffer
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glGenBuffersARB(1, &mVBONormals); // Get A Valid Name
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glBindBufferARB(GL_ARRAY_BUFFER_ARB, mVBONormals); // Bind The Buffer
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// Load The Data
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glBufferDataARB(GL_ARRAY_BUFFER_ARB, mVertexQty * sizeof(Vector3f), normal, GL_STATIC_DRAW_ARB);
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// Generate And Bind The Texture Coordinate Buffer
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glGenBuffersARB(1, &mVBOTexCoords); // Get A Valid Name
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glBindBufferARB(GL_ARRAY_BUFFER_ARB, mVBOTexCoords); // Bind The Buffer
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// Load The Data
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glBufferDataARB(GL_ARRAY_BUFFER_ARB, mVertexQty * sizeof(Texel), texel, GL_STATIC_DRAW_ARB);
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glBindBuffer(GL_ARRAY_BUFFER, 0);
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delete [] vertex;
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delete [] texel;
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delete [] normal;
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#ifdef _DEBUG
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printf("[ Done ]\n");
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#endif
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}
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void Mesh::render_vbo()
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{
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glEnableClientState(GL_VERTEX_ARRAY);
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glEnableClientState(GL_NORMAL_ARRAY);
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glBindBufferARB(GL_ARRAY_BUFFER_ARB, mVBONormals);
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glNormalPointer(GL_FLOAT, 0, 0);
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glBindBufferARB(GL_ARRAY_BUFFER_ARB, mVBOVertices);
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glVertexPointer(3, GL_FLOAT, 0, 0);
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glDrawArrays(GL_TRIANGLES, 0, mVertexQty);
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glBindBuffer(GL_ARRAY_BUFFER, 0);
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glDisableClientState(GL_NORMAL_ARRAY);
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glDisableClientState(GL_VERTEX_ARRAY);
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}
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