added dev/MinGfx/

1 files changed, 727 insertions, 0 deletions

diff --git a/dev/MinGfx/src/quick_shapes.cc b/dev/MinGfx/src/quick_shapes.cc
new file mode 100644
index 0000000..388aa3d
--- /dev/null
+++ b/dev/MinGfx/src/quick_shapes.cc
@@ -0,0 +1,727 @@
+/*
+ Copyright (c) 2017,2018 Regents of the University of Minnesota.
+ All Rights Reserved.
+ See corresponding header file for details.
+ */
+
+#include "quick_shapes.h"
+#include "platform.h"
+
+#include <cmath>
+#include <iostream>
+#include <string>
+
+
+namespace mingfx {
+    
+    
+    
+#define PI 3.14159265359f
+#define TWOPI 6.28318530718f
+    
+    
+    
+// Helper datastructure for building shapes algorithmically
+class Vertex {
+public:
+    Vertex(GLfloat xx, GLfloat yy, GLfloat zz, GLfloat nnx, GLfloat nny, GLfloat nnz) :
+    x(xx), y(yy), z(zz), nx(nnx), ny(nny), nz(nnz) {}
+    
+    GLfloat x;
+    GLfloat y;
+    GLfloat z;
+    GLfloat nx;
+    GLfloat ny;
+    GLfloat nz;
+};
+
+    
+    
+    
+QuickShapes::QuickShapes() {
+}
+
+QuickShapes::~QuickShapes() {
+}
+    
+    
+    
+    
+// ------------  CUBE  ------------
+
+
+void QuickShapes::initCube() {
+    GLfloat vertices[]  = {
+        1.0f, 1.0f, 1.0f,  -1.0f, 1.0f, 1.0f,  -1.0f,-1.0f, 1.0f,      // v0-v1-v2 (front)
+        -1.0f,-1.0f, 1.0f,   1.0f,-1.0f, 1.0f,   1.0f, 1.0f, 1.0f,      // v2-v3-v0
+        
+        1.0f, 1.0f, 1.0f,   1.0f,-1.0f, 1.0f,   1.0f,-1.0f,-1.0f,      // v0-v3-v4 (right)
+        1.0f,-1.0f,-1.0f,   1.0f, 1.0f,-1.0f,   1.0f, 1.0f, 1.0f,      // v4-v5-v0
+        
+        1.0f, 1.0f, 1.0f,   1.0f, 1.0f,-1.0f,  -1.0f, 1.0f,-1.0f,      // v0-v5-v6 (top)
+        -1.0f, 1.0f,-1.0f,  -1.0f, 1.0f, 1.0f,   1.0f, 1.0f, 1.0f,      // v6-v1-v0
+        
+        -1.0f, 1.0f, 1.0f,  -1.0f, 1.0f,-1.0f,  -1.0f,-1.0f,-1.0f,      // v1-v6-v7 (left)
+        -1.0f,-1.0f,-1.0f,  -1.0f,-1.0f, 1.0f,  -1.0f, 1.0f, 1.0f,      // v7-v2-v1.0
+        
+        -1.0f,-1.0f,-1.0f,   1.0f,-1.0f,-1.0f,   1.0f,-1.0f, 1.0f,      // v7-v4-v3 (bottom)
+        1.0f,-1.0f, 1.0f,  -1.0f,-1.0f, 1.0f,  -1.0f,-1.0f,-1.0f,      // v3-v2-v7
+        
+        1.0f,-1.0f,-1.0f,  -1.0f,-1.0f,-1.0f,  -1.0f, 1.0f,-1.0f,      // v4-v7-v6 (back)
+        -1.0f, 1.0f,-1.0f,   1.0f, 1.0f,-1.0f,   1.0f,-1.0f,-1.0f       // v6-v5-v4
+    };
+    
+    GLfloat normals[]   = {
+        0, 0, 1,   0, 0, 1,   0, 0, 1,      // v0-v1-v2 (front)
+        0, 0, 1,   0, 0, 1,   0, 0, 1,      // v2-v3-v0
+        
+        1, 0, 0,   1, 0, 0,   1, 0, 0,      // v0-v3-v4 (right)
+        1, 0, 0,   1, 0, 0,   1, 0, 0,      // v4-v5-v0
+        
+        0, 1, 0,   0, 1, 0,   0, 1, 0,      // v0-v5-v6 (top)
+        0, 1, 0,   0, 1, 0,   0, 1, 0,      // v6-v1-v0
+        
+        -1, 0, 0,  -1, 0, 0,  -1, 0, 0,     // v1-v6-v7 (left)
+        -1, 0, 0,  -1, 0, 0,  -1, 0, 0,     // v7-v2-v1
+        
+        0,-1, 0,   0,-1, 0,   0,-1, 0,      // v7-v4-v3 (bottom)
+        0,-1, 0,   0,-1, 0,   0,-1, 0,      // v3-v2-v7
+        
+        0, 0,-1,   0, 0,-1,   0, 0,-1,      // v4-v7-v6 (back)
+        0, 0,-1,   0, 0,-1,   0, 0,-1       // v6-v5-v4
+    };
+    
+    cubeMesh_.SetVertices(vertices, 36);
+    cubeMesh_.SetNormals(normals, 36);
+    cubeMesh_.UpdateGPUMemory();
+}
+
+
+void QuickShapes::DrawCube(const Matrix4 &modelMatrix, const Matrix4 &viewMatrix,
+                const Matrix4 &projectionMatrix, const Color &color)
+{
+    if (cubeMesh_.num_vertices() == 0) {
+        initCube();
+    }
+    defaultMaterial_.ambient_reflectance = color;
+    defaultMaterial_.diffuse_reflectance = color;
+    defaultMaterial_.surface_texture = emptyTex_;
+    defaultShader_.Draw(modelMatrix, viewMatrix, projectionMatrix, &cubeMesh_, defaultMaterial_);
+}
+
+
+
+
+// ------------  SQUARE  ------------
+
+
+void QuickShapes::initSquare() {
+    GLfloat vertices[] = {
+        1.0f, 0.0f, 1.0f,   1.0f, 0.0f,-1.0f,  -1.0f, 0.0f,-1.0f,      // v0-v5-v6 (top)
+        -1.0f, 0.0f,-1.0f,  -1.0f, 0.0f, 1.0f,   1.0f, 0.0f, 1.0f      // v6-v1-v0
+    };
+    
+    GLfloat normals[] = {
+        0, 1, 0,   0, 1, 0,   0, 1, 0,
+        0, 1, 0,   0, 1, 0,   0, 1, 0
+    };
+    
+    GLfloat texcoords[] = {
+        1.0f, 1.0f,   1.0f, 0.0f,   0.0f, 0.0f,
+        0.0f, 0.0f,   0.0f, 1.0f,   1.0f, 1.0f
+    };
+    
+    squareMesh_.SetVertices(vertices, 6);
+    squareMesh_.SetNormals(normals, 6);
+    squareMesh_.SetTexCoords(0, texcoords, 6);
+    squareMesh_.UpdateGPUMemory();
+}
+
+
+void QuickShapes::DrawSquare(const Matrix4 &modelMatrix, const Matrix4 &viewMatrix,
+                  const Matrix4 &projectionMatrix, const Color &color)
+{
+    if (squareMesh_.num_vertices() == 0) {
+        initSquare();
+    }
+    defaultMaterial_.ambient_reflectance = color;
+    defaultMaterial_.diffuse_reflectance = color;
+    defaultMaterial_.surface_texture = emptyTex_;
+    defaultShader_.Draw(modelMatrix, viewMatrix, projectionMatrix, &squareMesh_, defaultMaterial_);
+}
+    
+
+void QuickShapes::DrawSquare(const Matrix4 &modelMatrix, const Matrix4 &viewMatrix,
+                  const Matrix4 &projectionMatrix, const Color &color,
+                  const Texture2D &tex)
+{
+    if (squareMesh_.num_vertices() == 0) {
+        initSquare();
+    }
+    defaultMaterial_.ambient_reflectance = color;
+    defaultMaterial_.diffuse_reflectance = color;
+    defaultMaterial_.surface_texture = tex;
+    defaultShader_.Draw(modelMatrix, viewMatrix, projectionMatrix, &squareMesh_, defaultMaterial_);
+}
+    
+    
+    
+
+
+// ------------  CYLINDER  ------------
+
+
+void QuickShapes::initCyl() {
+    
+    std::vector<Vertex> verts;
+    
+    Vertex top(0,1,0, 0,1,0);
+    Vertex bot(0,-1,0, 0,-1,0);
+    
+    const int nslices = 20;
+    for (int s=1; s<nslices+1; s++) {
+        int slast = s - 1;
+        GLfloat xlast = std::cosf(-TWOPI * (float)slast / (float)nslices);
+        GLfloat zlast = std::sinf(-TWOPI * (float)slast/(float)nslices);
+        GLfloat xnew = std::cosf(-TWOPI * (float)(s)/(float)nslices);
+        GLfloat znew = std::sinf(-TWOPI * (float)(s)/(float)nslices);
+        
+        // one triangle on the top
+        verts.push_back(top);
+        verts.push_back(Vertex(xlast,1,zlast, 0,1,0));
+        verts.push_back(Vertex(xnew,1,znew, 0,1,0));
+        
+        // two triangles to create a rect on the side
+        verts.push_back(Vertex(xlast,1,zlast, xlast,0,zlast));
+        verts.push_back(Vertex(xlast,-1,zlast, xlast,0,zlast));
+        verts.push_back(Vertex(xnew,1,znew, xnew,0,znew));
+        
+        verts.push_back(Vertex(xnew,-1,znew, xnew,0,znew));
+        verts.push_back(Vertex(xnew,1,znew, xnew,0,znew));
+        verts.push_back(Vertex(xlast,-1,zlast, xlast,0,zlast));
+        
+        // one triangle on the bottom
+        verts.push_back(bot);
+        verts.push_back(Vertex(xnew,-1,znew, 0,-1,0));
+        verts.push_back(Vertex(xlast,-1,zlast, 0,-1,0));
+    }
+    
+    std::vector<Point3> vertices;
+    std::vector<Vector3> normals;
+    for (int i=0; i<verts.size(); i++) {
+        vertices.push_back(Point3(verts[i].x, verts[i].y, verts[i].z));
+        normals.push_back(Vector3(verts[i].nx, verts[i].ny, verts[i].nz));
+    }    
+    cylMesh_.SetVertices(vertices);
+    cylMesh_.SetNormals(normals);
+    cylMesh_.UpdateGPUMemory();
+}
+
+
+void QuickShapes::DrawCylinder(const Matrix4 &modelMatrix, const Matrix4 &viewMatrix,
+                    const Matrix4 &projectionMatrix, const Color &color)
+{
+    if (cylMesh_.num_vertices() == 0) {
+        initCyl();
+    }
+    defaultMaterial_.ambient_reflectance = color;
+    defaultMaterial_.diffuse_reflectance = color;
+    defaultMaterial_.surface_texture = emptyTex_;
+    defaultShader_.Draw(modelMatrix, viewMatrix, projectionMatrix, &cylMesh_, defaultMaterial_);
+}
+
+
+
+
+// ------------  CONE  ------------
+
+
+void QuickShapes::initCone() {
+    
+    std::vector<Vertex> verts;
+    
+    Vertex top(0,1,0, 0,1,0);
+    Vertex bot(0,-1,0, 0,-1,0);
+    
+    const int nslices = 20;
+    for (int s=1; s<nslices+1; s++) {
+        int slast = s - 1;
+        GLfloat xlast = std::cosf(-TWOPI * (float)slast/(float)nslices);
+        GLfloat zlast = std::sinf(-TWOPI * (float)slast/(float)nslices);
+        GLfloat xnew = std::cosf(-TWOPI * (float)(s)/(float)nslices);
+        GLfloat znew = std::sinf(-TWOPI * (float)(s)/(float)nslices);
+        
+        // one triangle on the side
+        // normals are a bit more complex than for other shapes...
+        Vector3 nlast = Vector3(xlast, 2, zlast).ToUnit();
+        Vector3 nnew = Vector3(xnew, 2, znew).ToUnit();
+        Vector3 ntop = 0.5*(nlast + nnew);
+        
+        verts.push_back(Vertex(top.x, top.y, top.z, ntop[0], ntop[1], ntop[2]));
+        verts.push_back(Vertex(xlast,-1,zlast, nlast[0], nlast[1], nlast[2]));
+        verts.push_back(Vertex(xnew,-1,znew, nnew[0], nnew[1], nnew[2]));
+        
+        // one triangle on the bottom
+        verts.push_back(bot);
+        verts.push_back(Vertex(xnew,-1,znew, 0,-1,0));
+        verts.push_back(Vertex(xlast,-1,zlast, 0,-1,0));
+    }
+    
+    std::vector<Point3> vertices;
+    std::vector<Vector3> normals;
+    for (int i = 0; i < verts.size(); i++) {
+        vertices.push_back(Point3(verts[i].x, verts[i].y, verts[i].z));
+        normals.push_back(Vector3(verts[i].nx, verts[i].ny, verts[i].nz));
+    }
+    
+    coneMesh_.SetVertices(vertices);
+    coneMesh_.SetNormals(normals);
+    coneMesh_.UpdateGPUMemory();
+}
+
+
+void QuickShapes::DrawCone(const Matrix4 &modelMatrix, const Matrix4 &viewMatrix,
+                const Matrix4 &projectionMatrix, const Color &color)
+{
+    if (coneMesh_.num_vertices() == 0) {
+        initCone();
+    }
+    defaultMaterial_.ambient_reflectance = color;
+    defaultMaterial_.diffuse_reflectance = color;
+    defaultMaterial_.surface_texture = emptyTex_;
+    defaultShader_.Draw(modelMatrix, viewMatrix, projectionMatrix, &coneMesh_, defaultMaterial_);
+}
+
+
+
+
+
+// ------------  SPHERE  ------------
+
+
+void QuickShapes::initSph() {
+    
+    std::vector<Vertex> verts;
+    
+    Vertex top(0,1,0, 0,1,0);
+    Vertex bot(0,-1,0, 0,-1,0);
+    
+    const int nslices = 40;
+    const int nstacks = 40;
+    for (int s=1; s<nslices+1; s++) {
+        int slast = s - 1;
+        GLfloat xlast = std::cosf(-TWOPI * (float)slast/(float)nslices);
+        GLfloat zlast = std::sinf(-TWOPI * (float)slast/(float)nslices);
+        GLfloat xnew = std::cosf(-TWOPI * (float)(s)/(float)nslices);
+        GLfloat znew = std::sinf(-TWOPI * (float)(s)/(float)nslices);
+        
+        float stackstep = PI/(float)nstacks;
+        
+        // one triangle on the top
+        verts.push_back(top);
+        verts.push_back(Vertex(std::sinf(stackstep)*xlast,std::cosf(stackstep),std::sinf(stackstep)*zlast,
+                               std::sinf(stackstep)*xlast,std::cosf(stackstep),std::sinf(stackstep)*zlast));
+        verts.push_back(Vertex(std::sinf(stackstep)*xnew,std::cosf(stackstep),std::sinf(stackstep)*znew,
+                               std::sinf(stackstep)*xnew,std::cosf(stackstep),std::sinf(stackstep)*znew));
+        
+        for (int t=2; t<nstacks; t++) {
+            int tlast = t - 1;
+            GLfloat ylast = std::cosf(PI*(float)(tlast)/(float)nstacks);
+            GLfloat ynew = std::cosf(PI*(float)(t)/(float)nstacks);
+            
+            GLfloat rlast = std::sinf(PI * (float)(tlast)/(float)nstacks);
+            GLfloat rnew = std::sinf(PI * (float)(t)/(float)nstacks);
+            
+            // two triangles to create a rect on the side
+            verts.push_back(Vertex(rlast*xlast,ylast,rlast*zlast, rlast*xlast,ylast,rlast*zlast));
+            verts.push_back(Vertex(rnew*xlast,ynew,rnew*zlast, rnew*xlast,ynew,rnew*zlast));
+            verts.push_back(Vertex(rnew*xnew,ynew,rnew*znew, rnew*xnew,ynew,rnew*znew));
+            
+            verts.push_back(Vertex(rnew*xnew,ynew,rnew*znew, rnew*xnew,ynew,rnew*znew));
+            verts.push_back(Vertex(rlast*xnew,ylast,rlast*znew, rlast*xnew,ylast,rlast*znew));
+            verts.push_back(Vertex(rlast*xlast,ylast,rlast*zlast, rlast*xlast,ylast,rlast*zlast));
+        }
+        
+        // one triangle on the bottom
+        verts.push_back(bot);
+        verts.push_back(Vertex(std::sinf(stackstep)*xnew,std::cosf(PI-stackstep),std::sinf(stackstep)*znew,
+                               std::sinf(stackstep)*xnew,std::cosf(PI-stackstep),std::sinf(stackstep)*znew));
+        verts.push_back(Vertex(std::sinf(stackstep)*xlast,std::cosf(PI-stackstep),std::sinf(stackstep)*zlast,
+                               std::sinf(stackstep)*xlast,std::cosf(PI-stackstep),std::sinf(stackstep)*zlast));
+    }
+    
+    std::vector<Point3> vertices;
+    std::vector<Vector3> normals;
+    for (int i = 0; i < verts.size(); i++) {
+        vertices.push_back(Point3(verts[i].x, verts[i].y, verts[i].z));
+        normals.push_back(Vector3(verts[i].nx, verts[i].ny, verts[i].nz));
+    }
+    sphereMesh_.SetVertices(vertices);
+    sphereMesh_.SetNormals(normals);
+    sphereMesh_.UpdateGPUMemory();
+}
+
+
+void QuickShapes::DrawSphere(const Matrix4 &modelMatrix, const Matrix4 &viewMatrix,
+                  const Matrix4 &projectionMatrix, const Color &color)
+{
+    if (sphereMesh_.num_vertices() == 0) {
+        initSph();
+    }
+    defaultMaterial_.ambient_reflectance = color;
+    defaultMaterial_.diffuse_reflectance = color;
+    defaultMaterial_.surface_texture = emptyTex_;
+    defaultShader_.Draw(modelMatrix, viewMatrix, projectionMatrix, &sphereMesh_, defaultMaterial_);
+}
+
+
+
+
+// ------------  BRUSH  ------------
+
+
+void QuickShapes::initBrush() {
+    
+    // Raw vertices -- points that make up the brush geometry
+    const GLfloat v[19][3] = {
+        { 0.5f,   0.0f,   0.0f},  // 0
+        {-0.5f,   0.0f,   0.0f},  // 1
+        
+        { 0.5f,   0.1f,   0.25f}, // 2
+        {-0.5f,   0.1f,   0.25f}, // 3
+        { 0.5f,   0.1f,   0.75f}, // 4
+        {-0.5f,   0.1f,   0.75f}, // 5
+        { 0.1f,   0.06f,  1.0f},  // 6
+        {-0.1f,   0.06f,  1.0f},  // 7
+        { 0.15f,  0.1f,   1.75f}, // 8
+        {-0.15f,  0.1f,   1.75f}, // 9
+        
+        { 0.0f,   0.0f,   1.85f}, // 10
+        
+        { 0.5f,  -0.1f,   0.25f}, // 11
+        {-0.5f,  -0.1f,   0.25f}, // 12
+        { 0.5f,  -0.1f,   0.75f}, // 13
+        {-0.5f,  -0.1f,   0.75f}, // 14
+        { 0.1f,  -0.06f,  1.0f},  // 15
+        {-0.1f,  -0.06f,  1.0f},  // 16
+        { 0.15f, -0.1f,   1.75f}, // 17
+        {-0.15f, -0.1f,   1.75f}  // 18
+    };
+    
+    
+    // Vertices arranged into triangles
+    const GLfloat verts[34][3][3] = {
+        // top
+        {{v[0][0], v[0][1], v[0][2]},  {v[1][0], v[1][1], v[1][2]},  {v[2][0], v[2][1], v[2][2]}},
+        {{v[1][0], v[1][1], v[1][2]},  {v[3][0], v[3][1], v[3][2]},  {v[2][0], v[2][1], v[2][2]}},
+        
+        {{v[2][0], v[2][1], v[2][2]},  {v[3][0], v[3][1], v[3][2]},  {v[4][0], v[4][1], v[4][2]}},
+        {{v[3][0], v[3][1], v[3][2]},  {v[5][0], v[5][1], v[5][2]},  {v[4][0], v[4][1], v[4][2]}},
+        
+        {{v[4][0], v[4][1], v[4][2]},  {v[5][0], v[5][1], v[5][2]},  {v[6][0], v[6][1], v[6][2]}},
+        {{v[5][0], v[5][1], v[5][2]},  {v[7][0], v[7][1], v[7][2]},  {v[6][0], v[6][1], v[6][2]}},
+        
+        {{v[6][0], v[6][1], v[6][2]},  {v[7][0], v[7][1], v[7][2]},  {v[8][0], v[8][1], v[8][2]}},
+        {{v[7][0], v[7][1], v[7][2]},  {v[9][0], v[9][1], v[9][2]},  {v[8][0], v[8][1], v[8][2]}},
+        
+        {{v[8][0], v[8][1], v[8][2]},  {v[9][0], v[9][1], v[9][2]},  {v[10][0], v[10][1], v[10][2]}},
+        
+        // bottom
+        {{v[0][0], v[0][1], v[0][2]},  {v[12][0], v[12][1], v[12][2]},  {v[1][0], v[1][1], v[1][2]}},
+        {{v[11][0], v[11][1], v[11][2]},  {v[12][0], v[12][1], v[12][2]},  {v[0][0], v[0][1], v[0][2]}},
+        
+        {{v[11][0], v[11][1], v[11][2]},  {v[14][0], v[14][1], v[14][2]},  {v[12][0], v[12][1], v[12][2]}},
+        {{v[13][0], v[13][1], v[13][2]},  {v[14][0], v[14][1], v[14][2]},  {v[11][0], v[11][1], v[11][2]}},
+        
+        {{v[13][0], v[13][1], v[13][2]},  {v[16][0], v[16][1], v[16][2]},  {v[14][0], v[14][1], v[14][2]}},
+        {{v[15][0], v[15][1], v[15][2]},  {v[16][0], v[16][1], v[16][2]},  {v[13][0], v[13][1], v[13][2]}},
+        
+        {{v[15][0], v[15][1], v[15][2]},  {v[18][0], v[18][1], v[18][2]},  {v[16][0], v[16][1], v[16][2]}},
+        {{v[17][0], v[17][1], v[17][2]},  {v[18][0], v[18][1], v[18][2]},  {v[15][0], v[15][1], v[15][2]}},
+        
+        {{v[18][0], v[18][1], v[18][2]},  {v[17][0], v[17][1], v[17][2]},  {v[10][0], v[10][1], v[10][2]}},
+        
+        // one side
+        {{v[11][0], v[11][1], v[11][2]},  {v[0][0], v[0][1], v[0][2]},  {v[2][0], v[2][1], v[2][2]}},
+        
+        {{v[11][0], v[11][1], v[11][2]},  {v[2][0], v[2][1], v[2][2]},  {v[4][0], v[4][1], v[4][2]}},
+        {{v[4][0], v[4][1], v[4][2]},  {v[13][0], v[13][1], v[13][2]},  {v[11][0], v[11][1], v[11][2]}},
+        
+        {{v[13][0], v[13][1], v[13][2]},  {v[4][0], v[4][1], v[4][2]},  {v[6][0], v[6][1], v[6][2]}},
+        {{v[6][0], v[6][1], v[6][2]},  {v[15][0], v[15][1], v[15][2]},  {v[13][0], v[13][1], v[13][2]}},
+        
+        {{v[15][0], v[15][1], v[15][2]},  {v[6][0], v[6][1], v[6][2]},  {v[8][0], v[8][1], v[8][2]}},
+        {{v[8][0], v[8][1], v[8][2]},  {v[17][0], v[17][1], v[17][2]},  {v[15][0], v[15][1], v[15][2]}},
+        
+        {{v[17][0], v[17][1], v[17][2]},  {v[8][0], v[8][1], v[8][2]},  {v[10][0], v[10][1], v[10][2]}},
+        
+        // other side
+        {{v[3][0], v[3][1], v[3][2]},  {v[1][0], v[1][1], v[1][2]},  {v[12][0], v[12][1], v[12][2]}},
+        
+        {{v[3][0], v[3][1], v[3][2]},  {v[12][0], v[12][1], v[12][2]},  {v[14][0], v[14][1], v[14][2]}},
+        {{v[14][0], v[14][1], v[14][2]},  {v[5][0], v[5][1], v[5][2]},  {v[3][0], v[3][1], v[3][2]}},
+        
+        {{v[5][0], v[5][1], v[5][2]},  {v[14][0], v[14][1], v[14][2]},  {v[16][0], v[16][1], v[16][2]}},
+        {{v[16][0], v[16][1], v[16][2]},  {v[7][0], v[7][1], v[7][2]},  {v[5][0], v[5][1], v[5][2]}},
+        
+        {{v[7][0], v[7][1], v[7][2]},  {v[16][0], v[16][1], v[16][2]},  {v[18][0], v[18][1], v[18][2]}},
+        {{v[18][0], v[18][1], v[18][2]},  {v[9][0], v[9][1], v[9][2]},  {v[7][0], v[7][1], v[7][2]}},
+        
+        {{v[9][0], v[9][1], v[9][2]},  {v[18][0], v[18][1], v[18][2]},  {v[10][0], v[10][1], v[10][2]}}
+        
+    };
+    
+    
+    // Normals defined so as to make each face of the brush a flat surface
+    const GLfloat norms[34][3][3] = {
+        // top
+        {{0.0f, 0.93f, -0.37f}, {0.0f, 0.93f, -0.37f}, {0.0f, 0.93f, -0.37f}},
+        {{0.0f, 0.93f, -0.37f}, {0.0f, 0.93f, -0.37f}, {0.0f, 0.93f, -0.37f}},
+        
+        {{0.0f, 1.0f, 0.0f}, {0.0f, 1.0f, 0.0f}, {0.0f, 1.0f, 0.0f}},
+        {{0.0f, 1.0f, 0.0f}, {0.0f, 1.0f, 0.0f}, {0.0f, 1.0f, 0.0f}},
+        
+        {{0.0f, 0.988f, 0.158f}, {0.0f, 0.988f, 0.158f}, {0.0f, 0.988f, 0.158f}},
+        {{0.0f, 0.988f, 0.158f}, {0.0f, 0.988f, 0.158f}, {0.0f, 0.988f, 0.158f}},
+        
+        {{0.0f, 0.999f, -0.0533f}, {0.0f, 0.999f, -0.0533f}, {0.0f, 0.999f, -0.0533f}},
+        {{0.0f, 0.999f, -0.0533f}, {0.0f, 0.999f, -0.0533f}, {0.0f, 0.999f, -0.0533f}},
+        
+        {{0.0f, 0.709f, 0.709f}, {0.0f, 0.709f, 0.709f}, {0.0f, 0.709f, 0.709f}},
+        
+        // bottom
+        {{0.0f, -0.93f, -0.37f}, {0.0f, -0.93f, -0.37f}, {0.0f, -0.93f, -0.37f}},
+        {{0.0f, -0.93f, -0.37f}, {0.0f, -0.93f, -0.37f}, {0.0f, -0.93f, -0.37f}},
+        
+        {{0.0f, -1.0f, 0.0f}, {0.0f, -1.0f, 0.0f}, {0.0f, -1.0f, 0.0f}},
+        {{0.0f, -1.0f, 0.0f}, {0.0f, -1.0f, 0.0f}, {0.0f, -1.0f, 0.0f}},
+        
+        {{0.0f, -0.988f, 0.158f}, {0.0f, -0.988f, 0.158f}, {0.0f, -0.988f, 0.158f}},
+        {{0.0f, -0.988f, 0.158f}, {0.0f, -0.988f, 0.158f}, {0.0f, -0.988f, 0.158f}},
+        
+        {{0.0f, -0.999f, -0.0533f}, {0.0f, -0.999f, -0.0533f}, {0.0f, -0.999f, -0.0533f}},
+        {{0.0f, -0.999f, -0.0533f}, {0.0f, -0.999f, -0.0533f}, {0.0f, -0.999f, -0.0533f}},
+        
+        {{0.0f, -0.709f, 0.709f}, {0.0f, -0.709f, 0.709f}, {0.0f, -0.709f, 0.709f}},
+        
+        // one side
+        {{1.0f, 0.0f, 0.0f}, {1.0f, 0.0f, 0.0f}, {1.0f, 0.0f, 0.0f}},
+        
+        {{1.0f, 0.0f, 0.0f}, {1.0f, 0.0f, 0.0f}, {1.0f, 0.0f, 0.0f}},
+        {{1.0f, 0.0f, 0.0f}, {1.0f, 0.0f, 0.0f}, {1.0f, 0.0f, 0.0f}},
+        
+        {{0.848f, 0.0f, 0.530f}, {0.848f, 0.0f, 0.530f}, {0.848f, 0.0f, 0.530f}},
+        {{0.848f, 0.0f, 0.530f}, {0.848f, 0.0f, 0.530f}, {0.848f, 0.0f, 0.530f}},
+        
+        {{1.0f, 0.0f, 0.0f}, {1.0f, 0.0f, 0.0f}, {1.0f, 0.0f, 0.0f}},
+        {{1.0f, 0.0f, 0.0f}, {1.0f, 0.0f, 0.0f}, {1.0f, 0.0f, 0.0f}},
+        
+        {{0.709f, 0.0f, 0.709f}, {0.709f, 0.0f, 0.709f}, {0.709f, 0.0f, 0.709f}},
+        
+        // other side
+        {{-1.0f, 0.0f, 0.0f}, {-1.0f, 0.0f, 0.0f}, {-1.0f, 0.0f, 0.0f}},
+        
+        {{-1.0f, 0.0f, 0.0f}, {-1.0f, 0.0f, 0.0f}, {-1.0f, 0.0f, 0.0f}},
+        {{-1.0f, 0.0f, 0.0f}, {-1.0f, 0.0f, 0.0f}, {-1.0f, 0.0f, 0.0f}},
+        
+        {{-0.848f, 0.0f, 0.530f}, {-0.848f, 0.0f, 0.530f}, {-0.848f, 0.0f, 0.530f}},
+        {{-0.848f, 0.0f, 0.530f}, {-0.848f, 0.0f, 0.530f}, {-0.848f, 0.0f, 0.530f}},
+        
+        {{-1.0f, 0.0f, 0.0f}, {-1.0f, 0.0f, 0.0f}, {-1.0f, 0.0f, 0.0f}},
+        {{-1.0f, 0.0f, 0.0f}, {-1.0f, 0.0f, 0.0f}, {-1.0f, 0.0f, 0.0f}},
+        
+        {{-0.709f, 0.0f, 0.709f}, {-0.709f, 0.0f, 0.709f}, {-0.709f, 0.0f, 0.709f}}
+    };
+    
+    brushMesh_.SetVertices((float*)verts, 102);
+    brushMesh_.SetNormals((float*)norms, 102);
+    brushMesh_.UpdateGPUMemory();
+}
+
+
+void QuickShapes::DrawBrush(const Matrix4 &modelMatrix, const Matrix4 &viewMatrix,
+                 const Matrix4 &projectionMatrix, const Color &color)
+{
+    if (brushMesh_.num_vertices() == 0) {
+        initBrush();
+    }
+    defaultMaterial_.ambient_reflectance = color;
+    defaultMaterial_.diffuse_reflectance = color;
+    defaultMaterial_.surface_texture = emptyTex_;
+    defaultShader_.Draw(modelMatrix, viewMatrix, projectionMatrix, &brushMesh_, defaultMaterial_);
+}
+
+
+
+// ----------------
+
+
+void QuickShapes::DrawLineSegment(const Matrix4 &modelMatrix,
+                       const Matrix4 &viewMatrix,
+                       const Matrix4 &projectionMatrix,
+                       const Color &color,
+                       const Point3 &p1,
+                       const Point3 &p2,
+                       float radius)
+{
+    Matrix4 S = Matrix4::Scale(Vector3(radius, 0.5f*(p2-p1).Length(), radius));
+    Vector3 y = (p2-p1).ToUnit();
+    Vector3 z = Vector3(1,0,0).Cross(y).ToUnit();
+    if (z == Vector3(0,0,0)) {
+        z = Vector3(0,0,1).Cross(y).ToUnit();
+    }
+    Vector3 x = y.Cross(z);
+    Matrix4 R = Matrix4::FromRowMajorElements(
+        x[0], y[0], z[0], 0,
+        x[1], y[1], z[1], 0,
+        x[2], y[2], z[2], 0,
+        0,    0,    0, 1
+    );
+    Matrix4 T = Matrix4::Translation(0.5 * Vector3(p1[0]+p2[0], p1[1]+p2[1], p1[2]+p2[2]));
+    
+    Matrix4 M = T * R * S;
+    
+    DrawCylinder(modelMatrix * M, viewMatrix, projectionMatrix, color);
+}
+
+
+
+void QuickShapes::DrawLines(const Matrix4 &modelMatrix,
+                 const Matrix4 &viewMatrix,
+                 const Matrix4 &projectionMatrix,
+                 const Color &color,
+                 const std::vector<Point3> &points,
+                 LinesType ltype,
+                 float radius)
+{
+    if (ltype == LinesType::LINES) {
+        for (size_t i=0; i<points.size(); i+=2) {
+            DrawLineSegment(modelMatrix, viewMatrix, projectionMatrix, color, points[i], points[i+1], radius);
+        }
+    }
+    else {
+        for (size_t i=0; i<points.size()-1; i++) {
+            DrawLineSegment(modelMatrix, viewMatrix, projectionMatrix, color, points[i], points[i+1], radius);
+        }
+        if (ltype == LinesType::LINE_LOOP) {
+            DrawLineSegment(modelMatrix, viewMatrix, projectionMatrix, color, points[points.size()-1], points[0], radius);
+        }
+    }
+}
+
+    
+    
+void QuickShapes::DrawArrow(const Matrix4 &modelMatrix,
+                 const Matrix4 &viewMatrix,
+                 const Matrix4 &projectionMatrix,
+                 const Color &color,
+                 Point3 p, Vector3 dir, float radius)
+{
+    float d = dir.Length() - 8.0f*radius;
+    DrawLineSegment(modelMatrix, viewMatrix, projectionMatrix, color, p, p + d*dir.ToUnit(), radius);
+    
+    Matrix4 S = Matrix4::Scale(Vector3(radius*3.0f, radius*4.0f, radius*3.0f));
+    Vector3 y = dir.ToUnit();
+    Vector3 z = Vector3(1,0,0).Cross(y).ToUnit();
+    if (z == Vector3(0,0,0)) {
+        z = Vector3(0,0,1).Cross(y).ToUnit();
+    }
+    Vector3 x = y.Cross(z);
+    Matrix4 R = Matrix4::FromRowMajorElements(
+                                              x[0], y[0], z[0], 0,
+                                              x[1], y[1], z[1], 0,
+                                              x[2], y[2], z[2], 0,
+                                              0,    0,    0, 1
+                                              );
+    Matrix4 T = Matrix4::Translation((p + d*dir.ToUnit()) - Point3::Origin());
+    
+    Matrix4 M = T * R * S * Matrix4::Translation(Vector3(0,1,0));
+    
+    DrawCone(modelMatrix * M, viewMatrix, projectionMatrix, color);
+}
+    
+    
+void QuickShapes::DrawAxes(const Matrix4 &modelMatrix,
+                const Matrix4 &viewMatrix,
+                const Matrix4 &projectionMatrix)
+{
+    DrawArrow(modelMatrix, viewMatrix, projectionMatrix, Color(1.0f, 0.6f, 0.6f), Point3::Origin(), Vector3::UnitX(), 0.02f);
+    DrawArrow(modelMatrix, viewMatrix, projectionMatrix, Color(0.6f, 1.0f, 0.6f), Point3::Origin(), Vector3::UnitY(), 0.02f);
+    DrawArrow(modelMatrix, viewMatrix, projectionMatrix, Color(0.6f, 0.6f, 1.0f), Point3::Origin(), Vector3::UnitZ(), 0.02f);
+
+}
+    
+    
+void QuickShapes::initFull() {
+    GLfloat vertices[] = {
+        -1, -1, 0,   1, -1, 0,  1, 1, 0,
+        -1, -1, 0,   1, 1, 0,   -1, 1, 0
+    };
+    
+    GLfloat normals[] = {
+        0, 0, 1,   0, 0, 1,   0, 0, 1,
+        0, 0, 1,   0, 0, 1,   0, 0, 1
+    };
+    
+    GLfloat texcoords[] = {
+        0.0f, 1.0f,   1.0f, 1.0f,   1.0f, 0.0f,
+        0.0f, 1.0f,   1.0f, 0.0f,   0.0f, 0.0f
+    };
+    
+    fullMesh_.SetVertices(vertices, 6);
+    fullMesh_.SetNormals(normals, 6);
+    fullMesh_.SetTexCoords(0, texcoords, 6);
+    fullMesh_.UpdateGPUMemory();
+}
+    
+
+void QuickShapes::DrawFullscreenTexture(const Color &color, const Texture2D &tex) {
+    if (fullMesh_.num_vertices() == 0) {
+        initFull();
+    }
+    DrawWithFullscreen(color, &fullMesh_, tex);
+}
+    
+    
+    
+    
+
+void QuickShapes::DrawWithFullscreen(const Color &color, Mesh *mesh, const Texture2D &tex) {
+    if (!fullscreenShader_.initialized()) {
+        fullscreenShader_.AddVertexShaderFromFile(Platform::FindMinGfxShaderFile("fullscreen.vert"));
+        fullscreenShader_.AddFragmentShaderFromFile(Platform::FindMinGfxShaderFile("fullscreen.frag"));
+        fullscreenShader_.LinkProgram();
+    }
+
+    glDisable(GL_DEPTH_TEST);
+    glDepthMask(GL_FALSE);
+    
+    // Activate the shader program
+    fullscreenShader_.UseProgram();
+    
+    // Pass uniforms and textures from C++ to the GPU Shader Program
+    fullscreenShader_.SetUniform("TintColor", color);
+    fullscreenShader_.BindTexture("SurfaceTexture", tex);
+    
+    // Draw the mesh using the shader program
+    mesh->Draw();
+    
+    // Deactivate the shader program
+    fullscreenShader_.StopProgram();
+    
+    glEnable(GL_DEPTH_TEST);
+    glDepthMask(GL_TRUE);
+}
+
+
+DefaultShader* QuickShapes::default_shader() {
+    return &defaultShader_;
+}
+    
+    
+DefaultShader::MaterialProperties* QuickShapes::material() {
+    return &defaultMaterial_;
+}
+
+    
+} // end namespace