const Matrix& Matrix::operator*=( const Matrix &rhs )
{
cairo_matrix_t r;
cairo_matrix_multiply( &r, &getCairoMatrix(), &rhs.getCairoMatrix() );
init( r.xx, r.yx, r.xy, r.yy, r.x0, r.y0 );
return *this;
}
void ofCairoRenderer::scale(float xAmnt, float yAmnt, float zAmnt ){
if(!surface || !cr) return;
cairo_matrix_scale(getCairoMatrix(),xAmnt,yAmnt);
setCairoMatrix();
if(!b3D) return;
modelView.glScale(xAmnt,yAmnt,zAmnt);
}
void ofCairoRenderer::rotateZ(float degrees){
if(!surface || !cr) return;
cairo_matrix_rotate(getCairoMatrix(),degrees*DEG_TO_RAD);
setCairoMatrix();
if(!b3D) return;
modelView.glRotate(180,0,0,1);
}
void ofCairoRenderer::draw(vector<ofPoint> & vertexData, ofPrimitiveMode drawMode){
if(vertexData.size()==0) return;
pushMatrix();
cairo_matrix_init_identity(getCairoMatrix());
cairo_new_path(cr);
//if(indices.getNumIndices()){
int i = 1;
ofVec3f v = transform(vertexData[0]);
ofVec3f v2;
cairo_move_to(cr,v.x,v.y);
if(drawMode==OF_PRIMITIVE_TRIANGLE_STRIP){
v = transform(vertexData[1]);
cairo_line_to(cr,v.x,v.y);
v = transform(vertexData[2]);
cairo_line_to(cr,v.x,v.y);
i=2;
}
for(; i<(int)vertexData.size(); i++){
v = transform(vertexData[i]);
switch(drawMode){
case(OF_PRIMITIVE_TRIANGLES):
if((i+1)%3==0){
cairo_line_to(cr,v.x,v.y);
v2 = transform(vertexData[i-2]);
cairo_line_to(cr,v2.x,v2.y);
cairo_move_to(cr,v.x,v.y);
}else if((i+3)%3==0){
cairo_move_to(cr,v.x,v.y);
}else{
cairo_line_to(cr,v.x,v.y);
}
break;
case(OF_PRIMITIVE_TRIANGLE_STRIP):
v2 = transform(vertexData[i-2]);
cairo_line_to(cr,v.x,v.y);
cairo_line_to(cr,v2.x,v2.y);
cairo_move_to(cr,v.x,v.y);
break;
case(OF_PRIMITIVE_TRIANGLE_FAN):
/*triangles.addIndex((GLuint)0);
triangles.addIndex((GLuint)1);
triangles.addIndex((GLuint)2);
for(int i = 2; i < primitive.getNumVertices()-1;i++){
triangles.addIndex((GLuint)0);
triangles.addIndex((GLuint)i);
triangles.addIndex((GLuint)i+1);
}*/
break;
default:break;
}
}
cairo_move_to(cr,vertexData[vertexData.size()-1].x,vertexData[vertexData.size()-1].y);
cairo_stroke( cr );
popMatrix();
}
void ofCairoRenderer::translate(float x, float y, float z ){
if(!surface || !cr) return;
cairo_matrix_translate(getCairoMatrix(),x,y);
setCairoMatrix();
if(!b3D) return;
modelView.glTranslate(ofVec3f(x,y,z));
}
void ofCairoRenderer::rotate(float degrees, float vecX, float vecY, float vecZ){
if(!surface || !cr) return;
// we can only do Z-axis rotations via cairo_matrix_rotate.
if(vecZ == 1.0f) {
cairo_matrix_rotate(getCairoMatrix(),degrees*DEG_TO_RAD);
setCairoMatrix();
}
if(!b3D) return;
modelView.glRotate(degrees,vecX,vecY,vecZ);
}
void ofCairoRenderer::loadIdentityMatrix (void){
if(!surface || !cr) return;
if(currentMatrixMode==OF_MATRIX_MODELVIEW){
cairo_matrix_init_identity(getCairoMatrix());
setCairoMatrix();
}
if(!b3D) return;
if(currentMatrixMode==OF_MATRIX_MODELVIEW){
modelView.makeIdentityMatrix();
}else if(currentMatrixMode==OF_MATRIX_PROJECTION){
projection.makeIdentityMatrix();
}
}
void ofCairoRenderer::draw(ofMesh & primitive, bool useColors, bool useTextures, bool useNormals){
if(primitive.getNumVertices() == 0){
return;
}
if(primitive.getNumIndices() == 0){
ofMesh indexedMesh = primitive;
indexedMesh.setupIndicesAuto();
draw(indexedMesh, useColors, useTextures, useNormals);
return;
}
pushMatrix();
cairo_matrix_init_identity(getCairoMatrix());
cairo_new_path(cr);
int i = 1;
ofVec3f v = transform(primitive.getVertex(primitive.getIndex(0)));
ofVec3f v2;
cairo_move_to(cr,v.x,v.y);
if(primitive.getMode()==OF_PRIMITIVE_TRIANGLE_STRIP){
v = transform(primitive.getVertex(primitive.getIndex(1)));
cairo_line_to(cr,v.x,v.y);
v = transform(primitive.getVertex(primitive.getIndex(2)));
cairo_line_to(cr,v.x,v.y);
i=2;
}
for(; i<primitive.getNumIndices(); i++){
v = transform(primitive.getVertex(primitive.getIndex(i)));
switch(primitive.getMode()){
case(OF_PRIMITIVE_TRIANGLES):
if((i+1)%3==0){
cairo_line_to(cr,v.x,v.y);
v2 = transform(primitive.getVertex(primitive.getIndex(i-2)));
cairo_line_to(cr,v2.x,v2.y);
cairo_move_to(cr,v.x,v.y);
}else if((i+3)%3==0){
cairo_move_to(cr,v.x,v.y);
}else{
cairo_line_to(cr,v.x,v.y);
}
break;
case(OF_PRIMITIVE_TRIANGLE_STRIP):
v2 = transform(primitive.getVertex(primitive.getIndex(i-2)));
cairo_line_to(cr,v.x,v.y);
cairo_line_to(cr,v2.x,v2.y);
cairo_move_to(cr,v.x,v.y);
break;
case(OF_PRIMITIVE_TRIANGLE_FAN):
/*triangles.addIndex((GLuint)0);
triangles.addIndex((GLuint)1);
triangles.addIndex((GLuint)2);
for(int i = 2; i < primitive.getNumVertices()-1;i++){
triangles.addIndex((GLuint)0);
triangles.addIndex((GLuint)i);
triangles.addIndex((GLuint)i+1);
}*/
break;
default:break;
}
}
cairo_move_to(cr,primitive.getVertex(primitive.getIndex(primitive.getNumIndices()-1)).x,primitive.getVertex(primitive.getIndex(primitive.getNumIndices()-1)).y);
if(ofGetStyle().lineWidth>0){
cairo_stroke( cr );
}
popMatrix();
}
Vec2f Matrix::transformDistance( const Vec2f &v ) const
{
double x = v.x, y = v.y;
cairo_matrix_transform_distance( &getCairoMatrix(), &x, &y );
return Vec2f( (float)x, (float)y );
}
int32_t Matrix::invert()
{
return static_cast<int32_t>( cairo_matrix_invert( &getCairoMatrix() ) );
}
void Matrix::rotate( double radians )
{
cairo_matrix_rotate( &getCairoMatrix(), radians );
}
void Matrix::scale( double sx, double sy )
{
cairo_matrix_scale( &getCairoMatrix(), sx, sy );
}
void Matrix::translate( double tx, double ty )
{
cairo_matrix_translate( &getCairoMatrix(), tx, ty );
}
void Matrix::initIdentity()
{
cairo_matrix_init_identity( &getCairoMatrix() );
}
void ofCairoRenderer::draw(ofPrimitive & primitive){
if(primitive.getNumVertices()==0) return;
pushMatrix();
cairo_matrix_init_identity(getCairoMatrix());
cairo_new_path(cr);
//if(indices.getNumIndices()){
int i = 1;
ofVec3f v = transform(primitive.getVertex(primitive.getIndex(0)));
ofVec3f v2;
cairo_move_to(cr,v.x,v.y);
if(primitive.getMode()==OF_TRIANGLE_STRIP_MODE){
v = transform(primitive.getVertex(primitive.getIndex(1)));
cairo_line_to(cr,v.x,v.y);
v = transform(primitive.getVertex(primitive.getIndex(2)));
cairo_line_to(cr,v.x,v.y);
i=2;
}
for(; i<primitive.getNumIndices(); i++){
v = transform(primitive.getVertex(primitive.getIndex(i)));
switch(primitive.getMode()){
case(OF_TRIANGLES_MODE):
if((i+1)%3==0){
cairo_line_to(cr,v.x,v.y);
v2 = transform(primitive.getVertex(primitive.getIndex(i-2)));
cairo_line_to(cr,v2.x,v2.y);
cairo_move_to(cr,v.x,v.y);
}else if((i+3)%3==0){
cairo_move_to(cr,v.x,v.y);
}else{
cairo_line_to(cr,v.x,v.y);
}
break;
case(OF_TRIANGLE_STRIP_MODE):
v2 = transform(primitive.getVertex(primitive.getIndex(i-2)));
cairo_line_to(cr,v.x,v.y);
cairo_line_to(cr,v2.x,v2.y);
cairo_move_to(cr,v.x,v.y);
break;
case(OF_TRIANGLE_FAN_MODE):
/*triangles.addIndex((GLuint)0);
triangles.addIndex((GLuint)1);
triangles.addIndex((GLuint)2);
for(int i = 2; i < primitive.getNumVertices()-1;i++){
triangles.addIndex((GLuint)0);
triangles.addIndex((GLuint)i);
triangles.addIndex((GLuint)i+1);
}*/
break;
default:break;
}
}
cairo_move_to(cr,primitive.getVertex(primitive.getIndex(primitive.getNumIndices()-1)).x,primitive.getVertex(primitive.getIndex(primitive.getNumIndices()-1)).y);
if(ofGetStyle().lineWidth>0){
cairo_stroke( cr );
}
popMatrix();
}
