void Cloth::createGeometry() {
int i, j, pos;
int numVertsW = numW+1;
// create vertices
float faceW = (float)width/numW;
float faceH = (float)height/numH;
for(i=0; i<numH+1; i++) {
for(j=0; j<numW+1; j++) {
pos = numVertsW*i+j;
vertices.push_back(Vertex(pos, faceW*j, faceH*i, 0.f));
}
}
// create faces
for(i=0; i<numH; i++) {
for(j=0; j<numW; j++) {
pos = numVertsW*i+j;
faces.push_back(Face(&vertices[pos],
&vertices[pos+1],
&vertices[pos+numVertsW+1]));
faces.push_back(Face(&vertices[pos],
&vertices[pos+numVertsW+1],
&vertices[pos+numVertsW]));
}
}
verticesSize = vertices.size();
facesSize = faces.size();
// compute normals
computeNormals();
// init buffers
posData = new GLfloat[verticesSize*3]; // 3 coords per vertex
normalsData = new GLfloat[verticesSize*3]; // 3 coords per vertex
glBindBuffer(GL_ARRAY_BUFFER, verticesBuffer);
glBufferData(GL_ARRAY_BUFFER, verticesSize*3*sizeof(GLfloat)*2, 0, GL_STREAM_DRAW);
updateBufferData();
facesData = new GLuint[faces.size()*3]; // 3 vertices per face
for (int i=0; i<faces.size(); i++) {
facesData[i*3] = faces[i].vertices[0]->vId;
facesData[i*3+1] = faces[i].vertices[1]->vId;
facesData[i*3+2] = faces[i].vertices[2]->vId;
}
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, facesBuffer);
glBufferData(GL_ELEMENT_ARRAY_BUFFER, facesSize*3*sizeof(GLuint), facesData, GL_STATIC_DRAW);
}
void Cloth::update(float * distancePixels){
int pos=0;
float depthVal;
int pW = 640.0 / (numW+1);
int pH = 480.0 / (numH+1);
int x, y;
float scaleFactor = .0021;//.0021;
float minDistance = 20;
float prevDepth = 0;
for(int i=0; i<numH+1; i++) {
for(int j=0; j<numW+1; j++) {
x = j*pW;
y = i*pH;
depthVal = distancePixels[j*pW + i*pH*640];
//vertices[pos].pos.z = ofLerp(vertices[pos].pos.z, 900-(depthVal==0?200:depthVal)*6.4, 0.3);
if (depthVal!=0) {
//vertices[pos].pos.x = (x-640/2) * (depthVal+minDistance) * scaleFactor;
//vertices[pos].pos.y = (y-480/2) * (depthVal+minDistance) * scaleFactor;
//vertices[pos].pos.z = 900-(depthVal==0?200:depthVal)*6.4;
vertices[pos].pos.x = (x-640/2) * (depthVal+minDistance) * scaleFactor;
vertices[pos].pos.y = (y-480/2) * (depthVal+minDistance) * scaleFactor;
vertices[pos].pos.z = -depthVal;
prevDepth = depthVal;
}
else {
vertices[pos].pos.x = (x-640/2) * (prevDepth+minDistance) * scaleFactor;
vertices[pos].pos.y = (y-480/2) * (prevDepth+minDistance) * scaleFactor;
vertices[pos].pos.z = -prevDepth;
}
pos++;
}
}
// update normals
computeNormals();
// update buffer datas
updateBufferData();
}
GLuint GLES20Utils::createBuffer(const GLfloat* data) {
GLuint bufferName;
glGenBuffers(1, &bufferName);
updateBufferData(bufferName, data);
return bufferName;
}