vaomesh.h
#pragma once
#include <algorithm>
#include <vector>
#include <array>
#include<iostream>
#include <random>
#include <Eigen/Core>
#include <Eigen/Geometry>
#include <Eigen/LU>
#include "glprogram.h"
#include "glarray.h"
#include "matlab_utils.h"
class GLGeoFbo
{
public:
GLuint gPosition, gNormalAndShadow, gColor, rboDepth, gBuffer;
GLGeoFbo() :gPosition(0), gNormalAndShadow(0), gColor(0), rboDepth(0), gBuffer(0){};
~GLGeoFbo() { deleteGeoFbo();};
void createGeoFbo(int WIDTH,int HEIGHT)
{
glGenFramebuffers(1, &gBuffer);
glBindFramebuffer(GL_FRAMEBUFFER, gBuffer);
glGenTextures(1, &gPosition);
glBindTexture(GL_TEXTURE_2D, gPosition);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB16F, WIDTH, HEIGHT, 0, GL_RGB, GL_FLOAT, NULL);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, gPosition, 0);
glGenTextures(1, &gNormalAndShadow);
glBindTexture(GL_TEXTURE_2D, gNormalAndShadow);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA16F, WIDTH, HEIGHT, 0, GL_RGB, GL_FLOAT, NULL);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT1, GL_TEXTURE_2D, gNormalAndShadow, 0);
glGenTextures(1, &gColor);
glBindTexture(GL_TEXTURE_2D, gColor);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA16F, WIDTH, HEIGHT, 0, GL_RGB, GL_FLOAT, NULL);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT2, GL_TEXTURE_2D, gColor, 0);
unsigned int attachments[3] = { GL_COLOR_ATTACHMENT0, GL_COLOR_ATTACHMENT1, GL_COLOR_ATTACHMENT2 };
glDrawBuffers(3, attachments);
//unsigned int rboDepth;
glGenRenderbuffers(1, &rboDepth);
glBindRenderbuffer(GL_RENDERBUFFER, rboDepth);
glRenderbufferStorage(GL_RENDERBUFFER, GL_DEPTH_COMPONENT, WIDTH, HEIGHT);
glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_RENDERBUFFER, rboDepth);
// check if framebuffer is complete
if (glCheckFramebufferStatus(GL_FRAMEBUFFER) != GL_FRAMEBUFFER_COMPLETE)
std::cout << "Framebuffer not complete!" << std::endl;
glBindFramebuffer(GL_FRAMEBUFFER, 0);
}
void deleteGeoFbo()
{
glDeleteTextures(1, &gPosition);
glDeleteTextures(1, &gNormalAndShadow);
glDeleteTextures(1, &gColor);
glDeleteRenderbuffers(1, &rboDepth);
glDeleteFramebuffers(1, &gBuffer);
}
void bind() { glBindFramebuffer(GL_FRAMEBUFFER, gBuffer); };
void unbind() { glBindFramebuffer(GL_FRAMEBUFFER, 0); };
};
template<int nlayer>
class GLDpFbo
{
public:
GLuint rbo, fbo;
int w, h;
GLDpFbo() : fbo(0), rbo(0), w(0), h(0)
{
for (int i = 0; i < nlayer; i++) { color_layer[i] = 0; }
}
~GLDpFbo() { deleteDpFbo(); };
GLuint color_layer[nlayer];
GLuint depth[2] = { 0, 0 };
void createColorLayer()
{
glGenTextures(nlayer, color_layer);
for (int i = 0; i < nlayer; i++)
{
glBindTexture(GL_TEXTURE_2D, color_layer[i]);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA16F, w, h, 0, GL_RGB, GL_FLOAT, NULL);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
}
}
void createDepthBuffer()
{
glGenTextures(2, depth);
for (int i = 0; i < 2; i++)
{
glBindTexture(GL_TEXTURE_2D, depth[i]);
glTexImage2D(GL_TEXTURE_2D, 0, GL_R16F, w, h, 0, GL_RGB, GL_FLOAT, NULL);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
}
}
void createBuffer()
{
createColorLayer();
createDepthBuffer();
}
void clearColorLayerBuffer()
{
float cleardata[4] = { 1.0f, 1.0f, 1.0f, 1.0f };
GLuint clfbo = 0;
glGenFramebuffers(1, &clfbo);
glBindFramebuffer(GL_FRAMEBUFFER, clfbo);
for (int i = 0; i < nlayer; i++)
{
glBindTexture(GL_TEXTURE_2D, color_layer[i]);
glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, color_layer[i], 0);
glClearBufferfv(GL_COLOR, 0, cleardata);
}
glBindTexture(GL_TEXTURE_2D, 0);
glBindFramebuffer(GL_FRAMEBUFFER, 0);
}
void clearDepthBuffer()
{
float cleardata[1] = { 1.0f};
GLuint clfbo = 0;
glGenFramebuffers(1, &clfbo);
glBindFramebuffer(GL_FRAMEBUFFER, clfbo);
for (int i = 0; i < 2; i++)
{
glBindTexture(GL_TEXTURE_2D, depth[i]);
glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, depth[i], 0);
glClearBufferfv(GL_COLOR, 0, cleardata);
}
glBindTexture(GL_TEXTURE_2D, 0);
glBindFramebuffer(GL_FRAMEBUFFER, 0);
}
void clearDepthBufferAtN(int i)
{
float cleardata[1] = { 1.0f };
GLuint clfbo = 0;
glGenFramebuffers(1, &clfbo);
glBindFramebuffer(GL_FRAMEBUFFER, clfbo);
glBindTexture(GL_TEXTURE_2D, depth[i % 2]);
glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, depth[i % 2], 0);
glClearBufferfv(GL_COLOR, 0, cleardata);
glBindTexture(GL_TEXTURE_2D, 0);
if (glCheckFramebufferStatus(GL_FRAMEBUFFER) != GL_FRAMEBUFFER_COMPLETE)
std::cout << "Framebuffer not complete!" << std::endl;
glBindFramebuffer(GL_FRAMEBUFFER, 0);
}
void clearBuffer()
{
clearColorLayerBuffer();
clearDepthBuffer();
}
void DpFboBindDepthBuffer(int i)
{
glBindTexture(GL_TEXTURE_2D, depth[i % 2]);
glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, depth[i % 2], 0);
}
void DpFboBindColorBuffer(int i)
{
glBindTexture(GL_TEXTURE_2D, color_layer[i]);
glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT1, GL_TEXTURE_2D, color_layer[i], 0);
}
void DpFboBindBuffer(int i)
{
glBindFramebuffer(GL_FRAMEBUFFER, fbo);
DpFboBindDepthBuffer(i);
DpFboBindColorBuffer(i);
unsigned int attachments[2] = { GL_COLOR_ATTACHMENT0, GL_COLOR_ATTACHMENT1 };
glDrawBuffers(2, attachments);
glBindFramebuffer(GL_FRAMEBUFFER, 0);
}
void createDpFbo(int WIDTH, int HEIGHT)
{
glGenFramebuffers(1, &fbo);
glBindFramebuffer(GL_FRAMEBUFFER, fbo);
//unsigned int rboDepth;
glGenRenderbuffers(1, &rbo);
glBindRenderbuffer(GL_RENDERBUFFER, rbo);
glRenderbufferStorage(GL_RENDERBUFFER, GL_DEPTH_COMPONENT, WIDTH, HEIGHT);
glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_RENDERBUFFER, rbo);
// check if framebuffer is complete
if (glCheckFramebufferStatus(GL_FRAMEBUFFER) != GL_FRAMEBUFFER_COMPLETE)
std::cout << "Framebuffer not complete!" << std::endl;
glBindFramebuffer(GL_FRAMEBUFFER, 0);
w = WIDTH;
h = HEIGHT;
createBuffer();
}
void deleteDpFbo()
{
glDeleteTextures(nlayer, color_layer);
glDeleteTextures(2, depth);
glDeleteRenderbuffers(1, &rbo);
glDeleteFramebuffers(1, &fbo);
//
}
void bind() { glBindFramebuffer(GL_FRAMEBUFFER, fbo); };
void unbind() { glBindFramebuffer(GL_FRAMEBUFFER, 0); };
};
Eigen::Matrix3f quaternaion2matrix(const float *q)
{
double s = Eigen::Map<const Eigen::Vector4f>(q).squaredNorm();
Eigen::Matrix3f res;
float *m = res.data();
m[0] = 1.f - 2.f * (q[1] * q[1] + q[2] * q[2]);
m[1] = 2.f * (q[0] * q[1] - q[2] * q[3]);
m[2] = 2.f * (q[2] * q[0] + q[1] * q[3]);
m[3 + 0] = 2.f * (q[0] * q[1] + q[2] * q[3]);
m[3 + 1] = 1.f - 2.f * (q[2] * q[2] + q[0] * q[0]);
m[3 + 2] = 2.f * (q[1] * q[2] - q[0] * q[3]);
m[6 + 0] = 2.f * (q[2] * q[0] - q[1] * q[3]);
m[6 + 1] = 2.f * (q[1] * q[2] + q[0] * q[3]);
m[6 + 2] = 1.f - 2.f * (q[1] * q[1] + q[0] * q[0]);
return res.transpose();
}
Eigen::Matrix4f perspective(float fovy, float aspect, float zNear, float zFar)
{
assert(aspect > 0);
assert(zFar > zNear);
float radf = fovy / 180 * M_PI;
float tanHalfFovy = tan(radf / 2);
Eigen::Matrix4f res = Eigen::Matrix4f::Zero();
res(0, 0) = 1 / (aspect * tanHalfFovy);
res(1, 1) = 1 / (tanHalfFovy);
res(2, 2) = -(zFar + zNear) / (zFar - zNear);
res(3, 2) = -1;
res(2, 3) = -(2 * zFar * zNear) / (zFar - zNear);
return res;
}
Eigen::Matrix4f lookAt(const float* eye, const float* center, const float* up)
{
using Vec = Eigen::RowVector3f;
using MapVec = Eigen::Map<const Vec>;
Vec f = (MapVec(center) - MapVec(eye)).normalized();
Vec u = MapVec(up).normalized();
Vec s = f.cross(u).normalized();
u = s.cross(f);
Eigen::Matrix4f res;
res.leftCols(3) << s, u, -f, 0, 0, 0;
res.rightCols(1) << -res.topLeftCorner(3, 3)*MapVec(eye).transpose(), 1;
return res;
}
Eigen::Matrix4f ortho(const float left, const float right, const float bottom, const float top, const float zNear, const float zFar)
{
Eigen::Matrix4f res;
res.setZero();
res(0, 0) = 2.0f / (right - left);
res(1, 1) = 2.0f / (top - bottom);
res(2, 2) = -2.0f / (zFar - zNear);
res(0, 3) = -(right + left) / (right - left);
res(1, 3) = -(top + bottom) / (top - bottom);
res(2, 3) = -(zFar + zNear) / (zFar - zNear);
res(3, 3) = 1;
return res;
}
template<typename R = float, int dimension = 3>
struct GLMesh
{
enum { dim = dimension };
using MapMat4 = Eigen::Map < Eigen::Matrix < float, 4, 4, Eigen::RowMajor > >;
using ConstMat4 = Eigen::Map < const Eigen::Matrix < float, 4, 4, Eigen::RowMajor > >;
typedef std::array<R, 4> vec4;
typedef std::array<R, dim> vec;
enum PickingElements { PE_NONE = 0, PE_VERTEX, PE_FACE };
enum PickingOperations { PO_NONE = 0, PO_ADD, PO_REMOVE };
struct Mesh
{
std::vector<R> X, UV;
std::vector<R> normal;
std::vector<int> T;
size_t nVertex() const { return X.size() / dim; }
size_t nFace() const { return T.size() / 3; }
};
Mesh mesh;
GLTexture tex;
static GLTexture colormapTex;
static GLTexture chessboardTex;
static GLTexture chessboardTex_background;
bool isShadowMap = true;
bool isAo = true;
//bool IsShowDistortion = false;
GLFbo depthMapFbo, ssaoFBO, ssaoBlurFBO, resFBO;
const GLuint SHADOW_WIDTH = 4096, SHADOW_HEIGHT = 4096; //for high resolution shadow map
GLGeoFbo geoFbo;
GLDpFbo<3> dpFbo;
std::vector<vec> ssaoKernel;
GLuint noiseTexture;
int ssaoKernelSize = 64;
/*quad in screen*/
GLuint quadVAO = 0;
GLuint quadVBO;
/*border cube*/
GLuint cubeVAO = 0;
GLuint cubeVBO = 0;
int nVertex;
int nFace;
GLuint vaoHandle;
GLArray<R, dim> gpuX;
GLArray<R, dim> gpuNorm;
GLArray<int, 3, true> gpuT;
GLArray<R, 2> gpuUV;
GLArray<R, 1> gpuVertexData;
//GLArray<R, 1> gpuVertexDistortion;
GLArray<R, 1> gpuFaceData;
R vtxDataMinMax[2];
bool vizVtxDistortion;
std::map<int, vec> constrainVertices;
std::vector<R> vertexData;
std::vector<R> faceData;
std::vector<R> vertexVF;
int actVertex;
int actFace;
int actConstrainVertex;
//vec4 faceColor = { 0.6f, 0.6f, 0.6f, 1.f };
vec4 faceColor = { 0.8f, 0.8f, 0.8f, 0.3f };
vec4 edgeColor = { 0.f, 0.f, 0.f, 0.8f };
vec4 vertexColor = { 1.f, 0.f, 0.f, 1.0f };
int depthMode = 0;
float edgeWidth = 0.f;
float pointSize = 0.f;
int vp[4] = { 0, 0, 1280, 960 };
float auxPointSize;
float vertexDataDrawScale;
float faceDataDrawScale;
float VFDrawScale = 0.f;
float mMeshScale = 1.f;
float mTextureScale = 0.1f;
std::vector<int> auxVtxIdxs;
vec mTranslate = { 0, 0, 0 };
float mQRotate[4] = { 0,0,0,1 };
float mViewCenter[3] = { 0, 0, 0 };
R bbox[dim * 2];
bool showTexture = false;
bool drawTargetP2P = true;
float P2PHandleBlackSize = 1.0;
float P2PHandleCyanSize = 1.0;
bool isSmooth = true;
bool expImg = false;
static GLProgram pickProg, depthTestProg, geometryProj2Screen, pointSet, ssaoProg, screenProg, ssaoBlurProg;
vec Ambient = { 0.125f, 0.125f, 0.125f };
vec LightColor = { 0.8f, 0.8f, 0.8f };
vec LightDirection = { 0.2f, 0.8f, 1.0f };
float LightAngle = 0;
GLfloat Shininess = 30.0f;
GLfloat Strength = 0.5f;
vec HalfVector;
~GLMesh() { glDeleteVertexArrays(1, &vaoHandle); }
GLMesh() :vaoHandle(0), actVertex(-1), actFace(-1),
actConstrainVertex(-1), vertexDataDrawScale(0.f),
faceDataDrawScale(0.f), vizVtxDistortion(0), auxPointSize(0.f)
{
}
void resize(int w, int h)
{
vp[2] = w; vp[3] = h;
geoFbo.deleteGeoFbo();
geoFbo.createGeoFbo(2 * w, 2 * h);
dpFbo.deleteDpFbo();
dpFbo.createDpFbo(2 * w, 2 * h);
ssaoFBO.allocateStorage(2 * w, 2 * h, GL_RED, GL_RGB, GL_NEAREST, GL_REPEAT, GL_COLOR_ATTACHMENT0);
ssaoBlurFBO.allocateStorage(2 * w, 2 * h, GL_RED, GL_RGB, GL_NEAREST, GL_REPEAT, GL_COLOR_ATTACHMENT0);
resFBO.allocateStorage(w, h, GL_RGB, GL_RGB, GL_NEAREST, GL_REPEAT, GL_COLOR_ATTACHMENT0, GL_UNSIGNED_BYTE);
}
void allocateStorage(int nv, int nf)
{
if (nv == nVertex && nf == nFace) return;
nVertex = nv;
nFace = nf;
if (!vaoHandle) glGenVertexArrays(1, &vaoHandle);
glBindVertexArray(vaoHandle);
gpuX.allocateStorage(nv);
glVertexAttribPointer(0, dim, GLType<R>::val, GL_FALSE, 0, nullptr);
glEnableVertexAttribArray(0); // Vertex position
gpuUV.allocateStorage(nv);
glVertexAttribPointer(2, 2, GLType<R>::val, GL_FALSE, 0, nullptr);
glEnableVertexAttribArray(2); // Texture coords
gpuNorm.allocateStorage(nv);
glVertexAttribPointer(3, dim, GLType<R>::val, GL_FALSE, 0, nullptr);
glEnableVertexAttribArray(3); // Vertex normals
gpuVertexData.allocateStorage(nv);
glVertexAttribPointer(4, 1, GLType<R>::val, GL_FALSE, 0, nullptr);
glEnableVertexAttribArray(4); // Vertex data
gpuT.allocateStorage(nf);
glBindVertexArray(0);
depthMapFbo.allocateStorage(SHADOW_WIDTH, SHADOW_HEIGHT, GL_DEPTH_COMPONENT, GL_DEPTH_COMPONENT, GL_NEAREST, GL_REPEAT, GL_DEPTH_ATTACHMENT);
glDrawBuffer(GL_NONE);
glReadBuffer(GL_NONE);
depthMapFbo.unbind();
//Create sample kernel and noise texture
std::uniform_real_distribution<GLfloat> randomFloats(0.0, 1.0);
std::default_random_engine generator;
for (int i = 0; i < ssaoKernelSize; i++)
{
vec sample = {randomFloats(generator) * 2.0 - 1.0, randomFloats(generator) * 2.0 - 1.0, randomFloats(generator)};
Eigen::Map<Eigen::Vector3f>(sample.data()).normalize();
GLfloat scale = GLfloat(i) / 64.0;
scale = (0.1f + scale * scale * (1.0f - 0.1f)) * randomFloats(generator);
Eigen::Map<Eigen::Vector3f>(sample.data()) *= scale;
ssaoKernel.push_back(sample);
}
std::vector<vec> ssaoNoise;
for (GLuint i = 0; i < 16; i++)
{
vec noise = { randomFloats(generator) * 2.0 - 1.0, randomFloats(generator) * 2.0 - 1.0, randomFloats(generator) * 2.0 - 1.0 };
ssaoNoise.push_back(noise);
}
glGenTextures(1, &noiseTexture);
glBindTexture(GL_TEXTURE_2D, noiseTexture);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB16F, 4, 4, 0, GL_RGB, GL_FLOAT, ssaoNoise[0].data());
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
}
std::vector<int> getConstrainVertexIds() const {
std::vector<int> idxs;
idxs.reserve(constrainVertices.size());
for (auto it : constrainVertices) idxs.push_back(it.first);
return idxs;
}
std::vector<R> getConstrainVertexCoords() const {
std::vector<R> x;
x.reserve(constrainVertices.size()*dim);
for (auto it : constrainVertices) {
x.insert(x.end(), { it.second[0], it.second[1], it.second[2] });
}
return x;
}
void getTriangulation(int *t) { gpuT.downloadData(t, nFace); }
void getTriangulation(int ti, int *t) { gpuT.at(ti, t); }
void getVertex(R *x) { gpuX.downloadData(x, nVertex); }
void getVertexNorm(R *x) { gpuNorm.downloadData(x, nVertex); }
void getVertex(int vi, R *x) { gpuX.at(vi, x); }
void getVertexNorm(int vi, R *x) { gpuNorm.at(vi, x); }
void setVertex(int vi, const R *x)
{
//for (int i = 0; i < dim; i++) mesh.X[vi*dim + i] = x[i];
gpuX.setAt(vi, x);
}
void setVertexNorm(int vi, const R *x)
{
gpuNorm.setAt(vi,x);
}
void setConstraintVertices(const int *ids, const R* pos, size_t nc) {
constrainVertices.clear();
for (size_t i = 0; i < nc; i++) constrainVertices.insert({ ids[i], vec{ pos[i * 3], pos[i * 3 + 1], pos[i * 3 + 2] } });
}
void setVertexDataViz(const R* val)
{
/*if (val) {
gpuVertexData.uploadData(val, mesh.nVertex());
glBindVertexArray(vaoHandle);
gpuVertexData.bind();
glVertexAttribPointer(5, 1, GLType<R>::val, GL_FALSE, 0, nullptr);
glEnableVertexAttribArray(5);
auto mm = std::minmax_element(val, val + mesh.nVertex());
vtxDataMinMax[0] = *mm.first;
vtxDataMinMax[1] = *mm.second;
prog.bind();
prog.setUniform("dataMinMax", vtxDataMinMax[0], vtxDataMinMax[1]);
}
else {
glBindVertexArray(vaoHandle);
glDisableVertexAttribArray(5);
}*/
}
void updateDataVizMinMax()
{
/*prog.bind();
prog.setUniform("dataMinMax", vtxDataMinMax[0], vtxDataMinMax[1]);*/
}
template<class MatrixR, class MatrixI>
void upload(const MatrixR &x, const MatrixI &t, const R *uv)
{
upload(x.data(), (int)x.rows(), t.count() ? t.data() : nullptr, (int)t.rows(), uv);
}
template<class MatrixR, class MatrixI>
void upload(const MatrixR &x, const MatrixI &t, const MatrixR &norm, const R *uv)
{
upload(x.data(), (int)x.rows(), norm.data(), t.count() ? t.data() : nullptr, (int)t.rows(), uv);
}
void upload(const R* x, int nv, const int* t, int nf, const R* uv)
{
if (x)
allocateStorage(x ? nv : nVertex, t ? nf : nFace);
if (x) { gpuX.uploadData(x, nv, false); mesh.X.assign(x, x + nv*dim); }
if (uv) { gpuUV.uploadData(uv, nv, false); mesh.UV.assign(uv, uv + nv * 2); }
if (t) { gpuT.uploadData(t, nf, false); mesh.T.assign(t, t + nf * 3); }
if (x&&t) {
boundingbox(x, nv, bbox); // update bounding box for the initialization
constrainVertices.clear();
auxVtxIdxs.clear();
actVertex = -1;
actFace = -1;
actConstrainVertex = -1;
}
}
void upload(const R *x, int nv, const R *norm, const int *t, int nf, const R *uv)
{
if (x)
allocateStorage(x ? nv : nVertex, t ? nf : nFace);
if (x) { gpuX.uploadData(x, nv, false); mesh.X.assign(x, x + nv*dim); }
if (uv) { gpuUV.uploadData(uv, nv, false); mesh.UV.assign(uv, uv + nv * 2); }
if (t) { gpuT.uploadData(t, nf, false); mesh.T.assign(t, t + nf * 3); }
if (norm) { gpuNorm.uploadData(norm, nv, false); mesh.normal.assign(norm, norm + nv*dim); }
if (x&&t) {
boundingbox(x, nv, bbox); // update bounding box for the initialization
constrainVertices.clear();
auxVtxIdxs.clear();
actVertex = -1;
actFace = -1;
actConstrainVertex = -1;
/*vertexData = std::vector<R>(nv, 0);
faceData = std::vector<R>(nf, 1);
gpuVertexData.uploadData(vertexData.data(), nVertex, false);
gpuFaceData.uploadData(faceData.data(), nFace);*/
}
}
void updateBBox() {
boundingbox(mesh.X.data(), nVertex, bbox);
}
void resetmodelRotation()
{
mQRotate[0] = 0.0f;
mQRotate[1] = 0.0f;
mQRotate[2] = 0.0f;
mQRotate[3] = 1.0f;
}
void resetViewCenter()
{
mViewCenter[0] = 0.0f;
mViewCenter[1] = 0.0f;
mViewCenter[2] = 0.0f;
}
std::vector<R> baryCenters(const R* X)
{
std::vector<R> x(nFace * dim);
for (int i = 0; i < nFace; i++) {
const R *px[] = { &X[mesh.T[i * 3] * dim], &X[mesh.T[i * 3 + 1] * dim], &X[mesh.T[i * 3 + 2] * dim] };
for (int j = 0; j < dim; j++) x[i*dim + j] = (px[0][j] + px[1][j] + px[2][j]) / 3;
}
return x;
}
float actVertexData() const { return (actVertex >= 0 && actVertex < nVertex) ? vertexData[actVertex] : std::numeric_limits<float>::infinity(); }
float actFaceData() const { return (actFace >= 0 && actFace < nFace) ? faceData[actFace] : std::numeric_limits<float>::infinity(); }
void incActVertexData(float pct) { setVertexData(actVertex, (vertexData[actVertex] + 1e-3f) * (1 + pct)); }
void incActFaceData(float pct) { setFaceData(actFace, (faceData[actFace] + 1e-3f) * (1 + pct)); }
void setVertexData(int i, R v) {
MAKESURE(i < nVertex && i >= 0);
gpuVertexData.setAt(i, &v);
vertexData[i] = v;
}
void setFaceData(int i, R v) {
MAKESURE(i < nFace && i >= 0);
gpuFaceData.setAt(i, &v);
faceData[i] = v;
}
void setVertexData(const R *vtxData) { gpuVertexData.uploadData(vtxData, nVertex, false); }
void setFaceData(const R *vtxData) { gpuFaceData.uploadData(vtxData, nFace, false); }
bool showWireframe() const { return edgeWidth > 0; }
bool showVertices() const { return pointSize > 0; }
R drawscale() const
{
R scale0 = 1.9f / std::max(std::max(bbox[dim] - bbox[0], bbox[1 + dim] - bbox[1]), bbox[2 + dim] - bbox[2]);
return mMeshScale*scale0;
}
std::array<R, 16> matMVP(const int *vp, bool offsetDepth = false, bool colmajor = false) const {
R trans[] = { (bbox[0] + bbox[dim]) / 2, (bbox[1] + bbox[1 + dim]) / 2, (bbox[2] + bbox[2 + dim]) / 2 };
R ss = drawscale();
R t[] = { mTranslate[0] - trans[0], mTranslate[1] - trans[1], mTranslate[2] - trans[2] };
using Mat4 = Eigen::Matrix<float, 4, 4, Eigen::RowMajor>;
Mat4 proj = perspective(45.f, vp[2] / float(vp[3]), 0.1f, 100.0f);
if(offsetDepth) proj(2, 2) += 1e-5;
//float campos[] = { (bbox[0] + bbox[dim]) / 2, (bbox[1] + bbox[1 + dim]) / 2,(bbox[2] + bbox[2 + dim]) / 2+ 4 }, up[] = { 0, 1, 0 };// Head is up (set to 0,-1,0 to look upside-down)
//float campos[] = { 0, 0, 4 }, up[] = { 0, 1, 0 };// Head is up (set to 0,-1,0 to look upside-down)
float campos[] = { mViewCenter[0], mViewCenter[1] + 2, mViewCenter[2]+4 }, up[] = { 0, 1, 0 };// Head is up (set to 0,-1,0 to look upside-down)
Mat4 view = lookAt(campos, mViewCenter, up);
Mat4 model;
model << ss*Eigen::Matrix3f::Identity(), Eigen::Map<Eigen::Array3f>(t)*ss,
0, 0, 0, 1;
Mat4 Rot;
Rot << quaternaion2matrix(mQRotate), Eigen::Vector3f::Zero(), 0, 0, 0, 1;
model = Rot*model;
std::array<R,16> mvp;
Eigen::Map<Mat4>(mvp.data()) = proj * view * model;
if (colmajor) Eigen::Map<Mat4>(mvp.data()).transposeInPlace();
return mvp;
}
std::array<R, 16>matModel() const
{
R trans[] = { (bbox[0] + bbox[dim]) / 2, (bbox[1] + bbox[1 + dim]) / 2, (bbox[2] + bbox[2 + dim]) / 2 };
R ss = drawscale();
R t[] = { mTranslate[0] - trans[0], mTranslate[1] - trans[1], mTranslate[2] - trans[2] };
using Mat4 = Eigen::Matrix<float, 4, 4, Eigen::RowMajor>;
Mat4 scale;
scale << ss * Eigen::Matrix3f::Identity(), Eigen::Map<Eigen::Array3f>(t)*ss,
0, 0, 0, 1;
Mat4 Rot;
Rot << quaternaion2matrix(mQRotate), Eigen::Vector3f::Zero(), 0, 0, 0, 1;
std::array<R, 16> model;
Eigen::Map<Mat4>(model.data()) = Rot * scale;
return model;
}
std::array<R, 16> matView() const
{
using Mat4 = Eigen::Matrix<float, 4, 4, Eigen::RowMajor>;
float campos[] = { mViewCenter[0], mViewCenter[1] + 2, mViewCenter[2] + 4 }, up[] = { 0, 1, 0 };// Head is up (set to 0,-1,0 to look upside-down)
std::array<R, 16> view;
Eigen::Map<Mat4>(view.data()) = lookAt(campos, mViewCenter, up);
return view;
}
std::array<R, 16> matProject(bool offsetDepth = false, float offsetLength = 1e-5) const
{
using Mat4 = Eigen::Matrix<float, 4, 4, Eigen::RowMajor>;
std::array<R, 16> proj;
Eigen::Map<Mat4>(proj.data()) = perspective(45.f, vp[2] / float(vp[3]), 0.1f, 100.0f);
if (offsetDepth) Eigen::Map<Mat4>(proj.data())(2, 2) += offsetLength;
return proj;
}
std::array<R, 9> matNormalTransform(void) const {
R trans[] = { (bbox[0] + bbox[dim]) / 2, (bbox[1] + bbox[1 + dim]) / 2, (bbox[2] + bbox[2 + dim]) / 2 };
R ss = drawscale();
R t[] = { mTranslate[0] - trans[0], mTranslate[1] - trans[1], mTranslate[2] - trans[2] };
using Mat4 = Eigen::Matrix<float, 4, 4, Eigen::RowMajor>;
using Mat3 = Eigen::Matrix<float, 3, 3, Eigen::RowMajor>;
float campos[] = { mViewCenter[0], mViewCenter[1] + 2, mViewCenter[2] + 4 }, up[] = { 0, 1, 0 };// Head is up (set to 0,-1,0 to look upside-down)
Mat4 view = lookAt(campos, mViewCenter, up);
Mat4 model;
model << ss*Eigen::Matrix3f::Identity(), Eigen::Map<Eigen::Array3f>(t)*ss,
0, 0, 0, 1;
Mat4 Rot;
Rot << quaternaion2matrix(mQRotate), Eigen::Vector3f::Zero(), 0, 0, 0, 1;
model = Rot*model;
std::array<R, 9> NormalTransform;
Eigen::Map<Mat3>(NormalTransform.data()) = ((view*model).block<3, 3>(0, 0)).inverse().transpose();
return NormalTransform;
}
std::array<R, 16> matLightSpace(void) const {
using Mat4 = Eigen::Matrix<float, 4, 4, Eigen::RowMajor>;
using Mat3 = Eigen::Matrix<float, 3, 3, Eigen::RowMajor>;
Mat4 lightProjection = ortho(-8.0f, 8.0f, -8.0f, 8.0f, -8.0f, 8.0f);
float center0[] = { 0.0f, 0.0f ,0.0f };
float up[] = { 0.0, 1.0, 0.0 };
Mat4 lightView = lookAt(LightDirection.data(), center0, up);
std::array<R, 16> lightSpaceMatrix;
Eigen::Map<Mat4>(lightSpaceMatrix.data()) = lightProjection * lightView;
return lightSpaceMatrix;
}
void moveInScreen(int x0, int y0, int x1, int y1) {
float dx = (x1 - x0) * 2.f / vp[2];
float dy = -(y1 - y0) * 2.f / vp[3];
mViewCenter[0] -= dx;
mViewCenter[1] -= dy;
}
void renderQuad()
{
if (quadVAO == 0)
{
float quadVertices[] = {
// positions // texture Coords
-1.0f, 1.0f, 0.0f, 0.0f, 1.0f,
-1.0f, -1.0f, 0.0f, 0.0f, 0.0f,
1.0f, 1.0f, 0.0f, 1.0f, 1.0f,
1.0f, -1.0f, 0.0f, 1.0f, 0.0f,
};
// setup plane VAO
glGenVertexArrays(1, &quadVAO);
glGenBuffers(1, &quadVBO);
glBindVertexArray(quadVAO);
glBindBuffer(GL_ARRAY_BUFFER, quadVBO);
glBufferData(GL_ARRAY_BUFFER, sizeof(quadVertices), &quadVertices, GL_STATIC_DRAW);
glEnableVertexAttribArray(0);
glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 5 * sizeof(float), (void*)0);
glEnableVertexAttribArray(1);
glVertexAttribPointer(1, 2, GL_FLOAT, GL_FALSE, 5 * sizeof(float), (void*)(3 * sizeof(float)));
}
if (expImg)
resFBO.bind();
glBindVertexArray(quadVAO);
glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
glBindVertexArray(0);
if (expImg)
resFBO.unbind();
}
void RenderCube(GLProgram &Prog)
{
GLfloat sq2 = sqrt(2.0f) / 2.0f;
/*GLfloat backgroundTrans[16] =
{
1.0f, 0.0f, 0.0f, 0.0f,
0.0f, sq2, sq2, 6.0f,
0.0f, -sq2, sq2, 6.0f,
0.0f, 0.0f, 0.0f, 1.0f
};*/
GLfloat backgroundTrans[16] =
{
1.0f, 0.0f, 0.0f, 0.0f,
0.0f, 1, 0, 9.0f,
0.0f, 0, 1, 0.0f,
0.0f, 0.0f, 0.0f, 1.0f
};
Prog.setUniform("model", backgroundTrans);
// Initialize (if necessary)
if (cubeVAO == 0)
{
GLfloat vertices[] = {
// Bottom face
10.0f, -10.0f, -10.0f, 0.0f, 1.0f, 0.0f, 1.0f, 1.0f, // top-left
-10.0f, -10.0f, -10.0f, 0.0f, 1.0f, 0.0f, 0.0f, 1.0f, // top-right
10.0f, -10.0f, 10.0f, 0.0f, 1.0f, 0.0f, 1.0f, 0.0f,// bottom-left
-10.0f, -10.0f, 10.0f, 0.0f, 1.0f, 0.0f, 0.0f, 0.0f, // bottom-right
10.0f, -10.0f, 10.0f, 0.0f, 1.0f, 0.0f, 1.0f, 0.0f, // bottom-left
-10.0f, -10.0f, -10.0f, 0.0f, 1.0f, 0.0f, 0.0f, 1.0f, // top-right
};
glGenVertexArrays(1, &cubeVAO);
glGenBuffers(1, &cubeVBO);
// Fill buffer
glBindBuffer(GL_ARRAY_BUFFER, cubeVBO);
glBufferData(GL_ARRAY_BUFFER, sizeof(vertices), vertices, GL_STATIC_DRAW);
// Link vertex attributes
glBindVertexArray(cubeVAO);
glEnableVertexAttribArray(0);
glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 8 * sizeof(GLfloat), (GLvoid*)0);
glEnableVertexAttribArray(3);
glVertexAttribPointer(3, 3, GL_FLOAT, GL_FALSE, 8 * sizeof(GLfloat), (GLvoid*)(3 * sizeof(GLfloat)));
glEnableVertexAttribArray(2);
glVertexAttribPointer(2, 2, GL_FLOAT, GL_FALSE, 8 * sizeof(GLfloat), (GLvoid*)(6 * sizeof(GLfloat)));
glBindBuffer(GL_ARRAY_BUFFER, 0);
glBindVertexArray(0);
}
// Render Cube
glBindVertexArray(cubeVAO);
glDrawArrays(GL_TRIANGLES, 0, 6);
glBindVertexArray(0);
}
void render_in_light_space(GLProgram &Prog)
{
/*render in light space*/
Prog.bind();
//depthTestProg.setUniform("lightSpaceMatrix", matLightSpace().data());
Prog.setUniform("lightSpaceMatrix", matLightSpace().data());
glViewport(0, 0, SHADOW_WIDTH, SHADOW_HEIGHT);
depthMapFbo.bind();
glClear(GL_DEPTH_BUFFER_BIT);
RenderCube(Prog);
Prog.setUniform("model", matModel().data());
glBindVertexArray(vaoHandle);
glDrawElements(GL_TRIANGLES, 3 * nFace, GL_UNSIGNED_INT, nullptr); // not GL_INT
glBindVertexArray(0);
Prog.unbind();
depthMapFbo.unbind();
}
void geometry_pass(GLProgram &Prog)
{
/*geometry pass*/
glViewport(0, 0, 2 * vp[2], 2 * vp[3]);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
Prog.bind();
Prog.setUniform("view", matView().data());
Prog.setUniform("projection", matProject().data());
//Prog.setUniform("NormalTrans", matNormalTransform().data());
Prog.setUniform("lightSpaceMatrix", matLightSpace().data());
Prog.setUniform("LightDirection", LightDirection.data());
Prog.setUniform("smooth_mode", int(isSmooth));
glActiveTexture(GL_TEXTURE0);
glBindTexture(GL_TEXTURE_2D, depthMapFbo.tex);
Prog.setUniform("shadowMap", 0);
Prog.setUniform("vizDis", 0);
//Prog.setUniform("vizTex", 0);
Prog.setUniform("vizTex", 1);
glActiveTexture(GL_TEXTURE1);
chessboardTex_background.bind();
vec blue = { 128.f / 256.f, 128.f / 256.f, 1.f };
Prog.setUniform("color", blue.data());
RenderCube(Prog);
Prog.setUniform("color", faceColor.data());
Prog.setUniform("model", matModel().data());
if (vizVtxDistortion)
{
Prog.setUniform("vizDis", 1);
//Prog.setUniform("textScale", 1);
glActiveTexture(GL_TEXTURE1);
colormapTex.bind();
Prog.setUniform("Img", 1);
}
else {
Prog.setUniform("vizDis", 0);
Prog.setUniform("vizTex", 1);
Prog.setUniform("textScale", mTextureScale);
glActiveTexture(GL_TEXTURE1);
chessboardTex.bind();
Prog.setUniform("Img", 1);
}
glBindVertexArray(vaoHandle);
glDrawElements(GL_TRIANGLES, 3 * nFace, GL_UNSIGNED_INT, nullptr); // not GL_INT
glBindVertexArray(0);
Prog.unbind();
}
void draw_edge(GLProgram &Prog, GLuint& vaohdl)
{
Prog.bind();
Prog.setUniform("view", matView().data());
Prog.setUniform("LightDirection", LightDirection.data());
Prog.setUniform("model", matModel().data());
glBindVertexArray(vaohdl);
Prog.setUniform("vizDis", 0);
Prog.setUniform("vizTex", 0);
Prog.setUniform("projection", matProject(true).data());
glLineWidth(edgeWidth);
Prog.setUniform("color", edgeColor.data());
glPolygonMode(GL_FRONT_AND_BACK, GL_LINE);
glDrawElements(GL_TRIANGLES, 3 * nFace, GL_UNSIGNED_INT, nullptr); // not GL_INT
//glEnable(GL_DEPTH_TEST);
glPolygonMode(GL_FRONT_AND_BACK, GL_FILL);
Prog.unbind();
glBindVertexArray(0);
}
void draw_point(GLProgram &Prog)
{
Prog.bind();
Prog.setUniform("view", matView().data());
Prog.setUniform("model", matModel().data());
Prog.setUniform("projection", matProject(true, 1e-4).data());
glBindVertexArray(vaoHandle);
glEnable(0x8861); // WTF!!! Must enable this for draw a circle.
if (showVertices()) {
glPointSize(pointSize * mMeshScale);
Prog.setUniform("color", vertexColor.data());
glDrawArrays(GL_POINTS, 0, nVertex);
}
glBindVertexArray(0);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0);
Prog.bind();
if (!constrainVertices.empty()) {
const auto idxs = getConstrainVertexIds();
GLArray<R, dim> consX(getConstrainVertexCoords().data(), idxs.size());
glVertexAttribPointer(0, dim, GLType<R>::val, GL_FALSE, 0, nullptr);
glEnableVertexAttribArray(0); // Vertex position
/**/
if (P2PHandleCyanSize > 0)
{
if (expImg)
glPointSize((24 * 4) * mMeshScale * P2PHandleCyanSize);
else
glPointSize(24 * mMeshScale * P2PHandleCyanSize);
Prog.setUniform("color", 0.f, 1.f, 1.f, 1.0f);
if (drawTargetP2P)
glDrawArrays(GL_POINTS, 0, (GLsizei)idxs.size());
gpuX.bind();
glVertexAttribPointer(0, dim, GLType<R>::val, GL_FALSE, 0, nullptr);
glEnableVertexAttribArray(0); // Vertex position
// make sure this is before the next draw
if (actConstrainVertex >= 0) {
Prog.setUniform("color", 1.f, 0.f, 1.f, 1.0f);
const int id = idxs[actConstrainVertex];
glDrawElements(GL_POINTS, 1, GL_UNSIGNED_INT, &id);
}
}
if (P2PHandleBlackSize > 0)
{
if (expImg)
glPointSize(10 * 4 * mMeshScale * P2PHandleBlackSize);
else
glPointSize(10 * mMeshScale * P2PHandleBlackSize);
Prog.setUniform("projection", matProject(true, 2e-4).data());
Prog.setUniform("color", 0.f, 0.f, 0.f, 1.0f);
glDrawElements(GL_POINTS, (GLsizei)idxs.size(), GL_UNSIGNED_INT, idxs.data());
}
glPointSize(1.f);
}
Prog.unbind();
glBindVertexArray(0);
}
void render_ssao()
{
geoFbo.bind();
//isSmooth ? geometry_pass(geometryProj2Screen) : geometry_pass(geometryProj2Screen_flat);
geometry_pass(geometryProj2Screen);
if (showWireframe())
{
draw_edge(geometryProj2Screen, vaoHandle);
}
draw_point(pointSet);
geoFbo.unbind();
/*Create SSAO texture*/
ssaoFBO.bind();
//glViewport(0, 0, vp[2], vp[3]);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
ssaoProg.bind();
ssaoProg.setUniform("samples", ssaoKernel[0].data());
ssaoProg.setUniform("projection", matProject().data());
ssaoProg.setUniform("model_scale", drawscale());
glActiveTexture(GL_TEXTURE0);
glBindTexture(GL_TEXTURE_2D, geoFbo.gPosition);
ssaoProg.setUniform("gPosition", 0);
glActiveTexture(GL_TEXTURE1);
glBindTexture(GL_TEXTURE_2D, geoFbo.gNormalAndShadow);
ssaoProg.setUniform("gNormalAndShadow", 1);
glActiveTexture(GL_TEXTURE2);
glBindTexture(GL_TEXTURE_2D, noiseTexture);
ssaoProg.setUniform("texNoise", 2);
renderQuad();
ssaoFBO.unbind();
/*blur SSAO texture to remove noise*/
//glViewport(0, 0, vp[2], vp[3]);
ssaoBlurFBO.bind();
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
ssaoBlurProg.bind();
glActiveTexture(GL_TEXTURE0);
glBindTexture(GL_TEXTURE_2D, ssaoFBO.tex);
renderQuad();
ssaoBlurFBO.unbind();
/*add light (phong, shadow map and ssao shading model) in screen*/
glViewport(0, 0, vp[2], vp[3]);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
screenProg.bind();
screenProg.setUniform("Ambient", Ambient.data());
screenProg.setUniform("LightColor", LightColor.data());
screenProg.setUniform("LightDirection", LightDirection.data());
screenProg.setUniform("halfVector", HalfVector.data());
screenProg.setUniform("shininess", Shininess);
screenProg.setUniform("strength", Strength);
screenProg.setUniform("isShadowMap", int(isShadowMap));
screenProg.setUniform("isAo", int(isAo));
//glActiveTexture(GL_TEXTURE0);
//glBindTexture(GL_TEXTURE_2D, geoFbo.gPosition);
//screenProg.setUniform("gPosition", 0);
glActiveTexture(GL_TEXTURE1);
glBindTexture(GL_TEXTURE_2D, geoFbo.gNormalAndShadow);
screenProg.setUniform("gNormalAndShadow", 1);
glActiveTexture(GL_TEXTURE2);
glBindTexture(GL_TEXTURE_2D, geoFbo.gColor);
screenProg.setUniform("gColor", 2);
glActiveTexture(GL_TEXTURE3);
glBindTexture(GL_TEXTURE_2D, ssaoBlurFBO.tex);
screenProg.setUniform("ssao", 3);
renderQuad();
}
void draw()
{
using Vec3 = Eigen::Vector3f;
Vec3 ld = Eigen::Map<Vec3>(LightDirection.data());
ld.normalize();
Vec3 look;
look << 0, 2, 4;
look.normalize();
Eigen::Map<Vec3>(HalfVector.data()) = (ld + look).normalized();
render_in_light_space(depthTestProg);
if (!ssaoKernel.empty()) render_ssao();
}
void save_img()
{
expImg = true;
resize(vp[2] * 4, vp[3] * 4);
glViewport(0, 0, vp[2], vp[3]);
draw();
MyImage img;
img.img_malloc(vp[2], vp[3], 3);
GLubyte* pPixelData = img.data();
glBindTexture(GL_TEXTURE_2D, resFBO.tex);
glGetTexImage(GL_TEXTURE_2D, 0, GL_RGB, GL_UNSIGNED_BYTE, pPixelData);
time_t now_time = time(NULL);
tm* t_tm = localtime(&now_time);
img.write(std::string("scrst") + std::to_string(t_tm->tm_min) + std::to_string(t_tm->tm_sec) + std::string(".png"));
resize(vp[2] / 4, vp[3] / 4);
expImg = false;
}
int moveCurrentVertex(int x, int y)
{
if (actVertex < 0 || actVertex >= nVertex) return -1;
auto mv = matMVP(vp);
ConstMat4 MVP(mv.data());
Eigen::Vector4f v; v[3] = 1;
getVertex(actVertex, v.data());
v = MVP*v;
Eigen::Vector4f x1 = MVP.inverse().eval()*Eigen::Vector4f(x / R(vp[2]) * 2 - 1, 1 - y / R(vp[3]) * 2, v[2]/v[3], 1); // Make Sure call eval before topRows
x1 = x1 / x1[3];
if (constrainVertices.find(actVertex) != constrainVertices.end())
constrainVertices[actVertex] = { x1[0], x1[1], x1[2] };
return 0;
}
int Search_ConstrainVertices(int x, int y, const int *vp)
{
Eigen::Vector4f v; v[3] = 1;
auto mv = matMVP(vp);
ConstMat4 MVP(mv.data());
for (auto iter = constrainVertices.cbegin(); iter != constrainVertices.cend(); iter++)
{
getVertex(iter->first, v.data());
v = MVP*v;
v = v / v[3];
//int winX = vp[0] + vp[2] * (v[0] + 1) / 4.0f;
//int winY = vp[1] + vp[3] * (1-v[1]) / 4.0f;
int winX = vp[0] + vp[2] * (v[0] + 1) / 2.0f;
int winY = vp[1] + vp[3] * (1 - v[1]) / 2.0f;
if (((winX - x)*(winX - x) + (winY - y)*(winY - y)) < 100.0f)
{
return iter->first;
}
}
return -1;
}
int pick(int x, int y, int pickElem, int operation)
{
int idx = -1;
glViewport(0, 0, vp[2], vp[3]);
glEnable(GL_DEPTH_TEST);
if(pickElem==PE_VERTEX)
idx = Search_ConstrainVertices(x, y, vp);
if (idx < 0) {
ensure(nFace < 16777216, "not implemented for big mesh");
//glDrawBuffer(GL_BACK);
glDisable(GL_MULTISAMPLE); // make sure the color will not be interpolated
glClearColor(1.f, 1.f, 1.f, 0.f);
glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);
pickProg.bind();
pickProg.setUniform("MVP", matMVP(vp).data());
pickProg.setUniform("pickElement", pickElem); // 0/1 for pick vertex/face
glBindVertexArray(vaoHandle);
float pickdist = 15.f;
glPointSize(pickdist);
if (pickElem == PE_VERTEX) {
// write depth for the whole shape
glColorMask(GL_FALSE, GL_FALSE, GL_FALSE, GL_TRUE);
glDrawElements(GL_TRIANGLES, 3 * nFace, GL_UNSIGNED_INT, nullptr); // not GL_INT
glColorMask(GL_TRUE, GL_TRUE, GL_TRUE, GL_TRUE);
pickProg.setUniform("MVP", matMVP(vp,true).data());
glDrawArrays(GL_POINTS, 0, nVertex);
}
else
glDrawElements(GL_TRIANGLES, 3 * nFace, GL_UNSIGNED_INT, nullptr); // not GL_INT
unsigned char pixel[4];
glReadPixels(x, vp[3] - y, 1, 1, GL_RGBA, GL_UNSIGNED_BYTE, pixel); // y is inverted in OpenGL
idx = (pixel[0] + pixel[1] * 256 + pixel[2] * 256 * 256) - 1; // -1 to get true index, 0 means background
glBindVertexArray(0);
pickProg.unbind();
//glDrawBuffer(GL_FRONT);
glClearColor(1.f, 1.f, 1.f, 0.f);
//glEnable(GL_MULTISAMPLE);
}
if (pickElem == PE_VERTEX)
actVertex = idx;
else if (pickElem == PE_FACE)
actFace = idx;
int res = 0; // return how many vertex are added/deleted
if (idx >= 0) {
//printf("vertex %d is picked\n", idx);
if (pickElem == PE_VERTEX) {
auto it = constrainVertices.find(idx);
if (it == constrainVertices.end()) {
if (operation == PO_ADD && idx < nVertex) { // add constrain
vec v;
getVertex(idx, v.data());
constrainVertices[idx] = v;
res = 1;
}
}
else if (operation == PO_REMOVE) {
constrainVertices.erase(it);
res = -1;
}
}
}
auto i = getConstrainVertexIds();
auto it = std::find(i.cbegin(), i.cend(), actVertex);
actConstrainVertex = int((it == i.cend()) ? -1 : (it - i.cbegin()));
return res;
}
static void boundingbox(const R* x, int nv, R *bbox)
{
if (nv < 1) {
printf("empty point set!\n");
return;
}
for (int i = 0; i < dim; i++) bbox[i] = bbox[i + dim] = x[i];
for (int i = 1; i < nv; i++) {
for (int j = 0; j < dim; j++) {
bbox[j] = std::min(bbox[j], x[i*dim + j]);
bbox[j + dim] = std::max(bbox[j + dim], x[i*dim + j]);
}
}
}
static void buildShaders() {
geometryProj2Screen.compileAndLinkAllShadersFromFile("shader/geoInfo.vs", "shader/geoInfo.fs", "shader/geoInfo.gs");
pointSet.compileAndLinkAllShadersFromFile("shader/pointSet.vs", "shader/pointSet.fs");
depthTestProg.compileAndLinkAllShadersFromFile("shader/depthTest.vs", "shader/depthTest.fs");
ssaoProg.compileAndLinkAllShadersFromFile("shader/screen.vs", "shader/ssao.fs");
ssaoBlurProg.compileAndLinkAllShadersFromFile("shader/screen.vs", "shader/ssaoBlur.fs");
screenProg.compileAndLinkAllShadersFromFile("shader/screen.vs", "shader/screen.fs");
//////////////////////////////////////////////////////////////////////////
pickProg.compileAndLinkAllShadersFromString(
R"( #version 330
layout (location = 0) in vec3 VertexPosition;
flat out int vertexId;
uniform mat4 MVP;
void main(){
gl_Position = MVP*vec4(VertexPosition, 1);
vertexId = gl_VertexID;
})",
R"( #version 330
uniform int pickElement;
flat in int vertexId;
out vec4 FragColor;
void main(){
int id = ( (pickElement==0)?vertexId:gl_PrimitiveID ) + 1;
// Convert the integer id into an RGB color
FragColor = vec4( (id & 0x000000FF) >> 0, (id & 0x0000FF00) >> 8, (id & 0x00FF0000) >> 16, 255.f)/255.f;
})");
const unsigned char jetmaprgb[] = {
0, 0,144,
0, 0,160,
0, 0,176,
0, 0,192,
0, 0,208,
0, 0,224,
0, 0,240,
0, 0,255,
0, 16,255,
0, 32,255,
0, 48,255,
0, 64,255,
0, 80,255,
0, 96,255,
0,112,255,
0,128,255,
0,144,255,
0,160,255,
0,176,255,
0,192,255,
0,208,255,
0,224,255,
0,240,255,
0,255,255,
16,255,240,
32,255,224,
48,255,208,
64,255,192,
80,255,176,
96,255,160,
112,255,144,
128,255,128,
144,255,112,
160,255, 96,
176,255, 80,
192,255, 64,
208,255, 48,
224,255, 32,
240,255, 16,
255,255, 0,
255,240, 0,
255,224, 0,
255,208, 0,
255,192, 0,
255,176, 0,
255,160, 0,
255,144, 0,
255,128, 0,
255,112, 0,
255, 96, 0,
255, 80, 0,
255, 64, 0,
255, 48, 0,
255, 32, 0,
255, 16, 0,
255, 0, 0,
240, 0, 0,
224, 0, 0,
208, 0, 0,
192, 0, 0,
176, 0, 0,
160, 0, 0,
144, 0, 0,
128, 0, 0 };
colormapTex.setImage(MyImage((BYTE*)jetmaprgb, sizeof(jetmaprgb) / 3, 1, sizeof(jetmaprgb), 3)); // bug fix, pitch should be w*3
colormapTex.setClamping(GL_CLAMP_TO_EDGE);
chessboardTex.setImage(MyImage(std::string("chessboard.jpg")));
chessboardTex_background.setImage(MyImage(std::string("chessboard_background.png")));
}
};
typedef GLMesh<> MyMesh;
