311 lines
7.5 KiB
C#
311 lines
7.5 KiB
C#
using System;
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using OpenTK.Graphics.OpenGL;
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using OpenTK;
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using org.niclasundharald.engine;
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namespace org.niclasundharald.engine.graphics {
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public class Model3D {
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protected int vao,
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vbo, // Vertex Buffer
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cbo, // Color Buffer
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cbo2, // Second Color Buffer
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nbo; // Normals Buffer
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protected int nTriangles;
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public Vector3[] vertexes = null;
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public Vector4[] colors = null;
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public Vector4[] colors2 = null;
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public Vector3[] normals = null;
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public Triangle[] triangles = new Triangle[0];
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protected Model3D(){
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vao = GL.GenVertexArray();
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nTriangles = 0;
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prepare();
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}
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protected void prepare(){
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vbo = GL.GenBuffer();
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cbo = GL.GenBuffer();
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cbo2 = GL.GenBuffer();
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nbo = GL.GenBuffer();
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GL.BindVertexArray(vao);
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GL.BindBuffer(BufferTarget.ArrayBuffer, vbo);
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GL.VertexAttribPointer(0,
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3,
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VertexAttribPointerType.Float,
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false,
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0,
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0);
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GL.BindBuffer(BufferTarget.ArrayBuffer, cbo);
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GL.VertexAttribPointer(1,
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4,
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VertexAttribPointerType.Float,
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false,
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0,
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0);
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GL.BindBuffer(BufferTarget.ArrayBuffer, nbo);
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GL.VertexAttribPointer(2,
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3,
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VertexAttribPointerType.Float,
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false,
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0,
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0);
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GL.BindBuffer(BufferTarget.ArrayBuffer, cbo);
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GL.VertexAttribPointer(3,
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4,
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VertexAttribPointerType.Float,
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false,
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0,
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0);
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GL.BindVertexArray(0);
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}
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public void prepareBuffers(int nTriangles){
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this.vertexes = new Vector3[nTriangles * 3];
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this.normals = new Vector3[nTriangles * 3];
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this.colors = new Vector4[nTriangles * 3];
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this.colors2 = new Vector4[nTriangles * 3];
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this.vertexes.Fill(new Vector3(0,0,0));
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this.colors.Fill(new Vector4(0.5f,0.5f,0.5f,1.0f));
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this.colors2.Fill(new Vector4(0.0f,2.0f,0.0f,1.0f));
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this.nTriangles = nTriangles;
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rebind();
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}
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public void bind(){
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this.nTriangles = this.vertexes.Length / 3;
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if (this.vertexes == null){
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this.vertexes = new Vector3[nTriangles * 3];
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this.vertexes.Fill(new Vector3(0,0,0));
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}
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if (this.normals == null){
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this.normals = new Vector3[nTriangles * 3];
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}
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if (this.colors == null){
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this.colors = new Vector4[nTriangles * 3];
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this.colors.Fill(new Vector4(0.5f,0.5f,0.5f,1.0f));
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}
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if (this.colors2 == null){
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this.colors2 = new Vector4[nTriangles * 3];
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this.colors2.Fill(new Vector4(0.0f,2.0f,0.0f,1.0f));
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}
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rebind();
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}
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public void rebind(){
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bindVertexes();
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bindNormals();
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bindColors();
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bindColors2();
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}
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protected void bindVertexes(){
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GL.BindVertexArray(vao);
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GL.BindBuffer(BufferTarget.ArrayBuffer, vbo);
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GL.BufferData(BufferTarget.ArrayBuffer, 12 * vertexes.Length, vertexes, BufferUsageHint.StaticDraw);
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GL.EnableVertexAttribArray(0);
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if (this.triangles.Length != nTriangles){
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int nt = this.triangles.Length;
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Array.Resize<Triangle>(ref this.triangles,nTriangles);
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for (int n=nt;n<nTriangles;n++){
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this.triangles[n] = new Triangle(this,n);
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}
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}
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GL.BindVertexArray(0);
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}
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protected void bindNormals(){
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GL.BindVertexArray(vao);
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GL.BindBuffer(BufferTarget.ArrayBuffer, nbo);
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GL.BufferData(BufferTarget.ArrayBuffer, 12 * normals.Length, normals, BufferUsageHint.StaticDraw);
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GL.EnableVertexAttribArray(2);
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GL.BindVertexArray(0);
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}
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protected void bindColors(){
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GL.BindVertexArray(vao);
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GL.BindBuffer(BufferTarget.ArrayBuffer, cbo);
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GL.BufferData(BufferTarget.ArrayBuffer, 16 * colors.Length, colors, BufferUsageHint.StaticDraw);
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GL.EnableVertexAttribArray(1);
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GL.BindVertexArray(0);
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}
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protected void bindColors2(){
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GL.BindVertexArray(vao);
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GL.BindBuffer(BufferTarget.ArrayBuffer, cbo2);
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GL.BufferData(BufferTarget.ArrayBuffer, 16 * colors2.Length, colors2, BufferUsageHint.StaticDraw);
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GL.EnableVertexAttribArray(3);
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GL.BindVertexArray(0);
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}
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protected void bind(Vector3[] vertexes,Vector4[] colors,Vector3[] normals,Vector2[] uvs){
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if (vertexes != null){
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this.vertexes = vertexes;
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}
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if (colors != null){
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this.colors = colors;
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}
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if (normals != null){
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this.normals = normals;
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}
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bindVertexes();
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bindColors();
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bindNormals();
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}
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public virtual void draw(){
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GL.BindVertexArray(this.vao);
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GL.DrawArrays(PrimitiveType.Triangles, 0, nTriangles * 3);
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GL.BindVertexArray(0);
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}
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public static void setTriangle(Vector3[] vertexes,int n, Vector3 a, Vector3 b, Vector3 c)
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{
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vertexes[(3 * n)] = a;
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vertexes[(3 * n)+1] = b;
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vertexes[(3 * n)+2] = c;
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}
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public void computeNormals(){
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if ((normals == null)||(normals.Length != vertexes.Length)){
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normals = new Vector3[vertexes.Length];
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}
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for (int n=0;n<vertexes.Length-2;n+=3){
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Vector3 normal = Vector3.Cross( vertexes[n+2] - vertexes[n], vertexes[n+1] - vertexes[n] );
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normal.Normalize();
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normals[(n) ] = normal;
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normals[(n) + 1] = normal;
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normals[(n) + 2] = normal;
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}
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}
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public Triangle[] Triangles {
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get { return this.triangles; }
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}
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public static Model3D loadObjFile(string filename,float scale){
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return new LoadedModel(filename,scale);
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}
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public class Triangle{
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Model3D model;
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int n;
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public Triangle(Model3D model,int n){
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this.model = model;
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this.n = n;
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}
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public void vertexes(ref Vector3 a,ref Vector3 b,ref Vector3 c){
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a = model.vertexes[(3*n)];
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b = model.vertexes[(3*n)+1];
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c = model.vertexes[(3*n)+2];
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}
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public void vertexes(Vector3 a,Vector3 b,Vector3 c){
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model.vertexes[(3*n)] = a;
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model.vertexes[(3*n)+1] = b;
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model.vertexes[(3*n)+2] = c;
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}
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public void vertex(int a,ref Vector3 v){
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v = model.vertexes[(3*n) + a];
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}
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public void normal(int a,ref Vector3 n){
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n = model.vertexes[(3*this.n) + a];
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}
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public void color(int a,ref Vector4 c){
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c = model.colors[(3*n)+a];
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}
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public Vector3 VertexA {
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get { return model.vertexes[(3*n)]; }
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set { model.vertexes[(3*n)] = value; }
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}
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public Vector3 VertexB {
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get { return model.vertexes[(3*n)+1]; }
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set { model.vertexes[(3*n)+1] = value; }
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}
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public Vector3 VertexC {
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get { return model.vertexes[(3*n)+2]; }
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set { model.vertexes[(3*n)+2] = value; }
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}
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public Vector4 ColorA {
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get { return model.colors[(3*n)]; }
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set { model.colors[(3*n)] = value; }
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}
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public Vector4 ColorB {
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get { return model.colors[(3*n)+1]; }
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set { model.colors[(3*n)+1] = value; }
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}
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public Vector4 ColorC {
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get { return model.colors[(3*n)+2]; }
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set { model.colors[(3*n)+2] = value; }
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}
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public Vector4 Color2A {
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get { return model.colors2[(3*n)]; }
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set { model.colors2[(3*n)] = value; }
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}
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public Vector4 Color2B {
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get { return model.colors2[(3*n)+1]; }
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set { model.colors2[(3*n)+1] = value; }
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}
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public Vector4 Color2C {
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get { return model.colors2[(3*n)+2]; }
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set { model.colors2[(3*n)+2] = value; }
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}
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public void updateNormals(){
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Vector3 normal = Vector3.Cross( model.vertexes[(3*n)+1] - model.vertexes[(3*n)], model.vertexes[(3*n)+2] - model.vertexes[(3*n)] );
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normal.Normalize();
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model.normals[(3*n)] = normal;
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model.normals[(3*n)+1] = normal;
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model.normals[(3*n)+2] = normal;
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}
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}
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}
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} |