ObjectNode* genTree(int branching, int maxDepth, int density, float scaleFactor, float seasonProb, float height,
const mat4& initTrans, const mat4& initSkew)
{
ObjectNode* tree = new ObjectNode(nullptr,initTrans, initSkew);
mat4 tempRotate = rX(M_PI/2.0);
mat4 tempTrans = distort(1.0, 0.2, 1.0);
mat4 tempSkew = distort(1.0, 5.0, 1.0);
mat4 tempMove = translate(0.0, -2.0, 0.0);
tree->addChild( *new ObjectNode( Global::treeCone, tempMove * tempTrans * tempRotate,
tempSkew * tempRotate) );
tempTrans = distort(0.3, height, 0.3);
tempMove[1][3] = height - 2.0;
tree->addChild( *new ObjectNode(Global::treeCylinder, tempMove * tempTrans * tempRotate, tempRotate) );
tempMove[1][3] = height * 0.6 + 0.1;
tree->addChild( *genBranch(branching, maxDepth, density, scaleFactor, seasonProb, tempMove) );
mat4 rotMat = rY(2.0 * M_PI/4.0);
tempSkew = rZ(M_PI/4.0);
for (int i = 0; i < 4; ++i) {
tempSkew = rotMat * tempSkew;
tree->addChild( *genBranch(branching, maxDepth, density, scaleFactor, seasonProb,
tempMove * tempSkew, tempSkew) );
}
tree->addChild( *genLeafBunch(M_PI/2.0, 3.0, 0.5, density,
translate(0.0, height, 0.0) * scale(0.7)) );
return tree;
}
ObjectNode* genBranch(int branching, int maxDepth, int density, float scaleFactor, float seasonProb,
const mat4& initTrans, const mat4& initSkew, int currentDepth)
{
mat4 tempTrans = distort(0.2, 1.0, 0.2);
mat4 tempMove = translate(0.0, 1.0, 0.0);
mat4 tempSkew = distort(5.0, 1.0, 5.0);
mat4 tempRotate = rX(M_PI/2.0);
ObjectNode* branch = new ObjectNode(nullptr, initTrans, initSkew);
branch->addChild(*new ObjectNode( Global::treeCone, tempMove * tempTrans * tempRotate,
tempSkew * tempRotate ) );
if (currentDepth < maxDepth) {
const int branchFact = branching;
mat4 tempRotate = rZ(M_PI/6.0);
mat4 rotMat = rY(2.0 * M_PI / branchFact);
tempTrans = scale(scaleFactor);
tempMove = translate(0.0, 1.5, 0.0);
mat4 twist = rY(M_PI / branchFact) * tempMove;
mat4 loopTemp = rotMat * tempRotate;
for (int i = 0; i < branchFact; ++i) {
loopTemp = rotMat * loopTemp;
branch->addChild( *genBranch( branching, maxDepth, density, scaleFactor, seasonProb,
twist * loopTemp * tempTrans, loopTemp, currentDepth + 1 ) );
}
}
return branch;
}
uint32_t handleBranch(Assembler *assembler, char **tokens) {
CondCodes cond = mnemToCondCode(&tokens[0][1]);
uint32_t address = isalpha(tokens[1][0]) ?
//address starts with a char so is a label
getLabelAddress(assembler, tokens[1]) :
//else it's a numeric value
getValue(tokens[1]);
uint32_t offset = calcOffset(assembler, address, true);
return genBranch(cond, offset);
}
