X-Git-Url: http://git.tdb.fi/?p=libs%2Fgl.git;a=blobdiff_plain;f=source%2Fmatrix.cpp;h=f5089285d63295458698e1c392511348fc34a696;hp=7a91078621e647d293af0628d06044c95e719fcd;hb=f14435e58bfa0fa697a06ba9a454bb30cd37d9d8;hpb=4c89817d6e060323ec1ddd275f3265cea688c650 diff --git a/source/matrix.cpp b/source/matrix.cpp index 7a910786..f5089285 100644 --- a/source/matrix.cpp +++ b/source/matrix.cpp @@ -1,43 +1,429 @@ -/* $Id$ - -This file is part of libmspgl -Copyright © 2007 Mikko Rasa, Mikkosoft Productions -Distributed under the LGPL -*/ - +#include +#include +#include #include "matrix.h" +using namespace std; + namespace Msp { namespace GL { +Matrix::Matrix(): + flags(IDENTITY) +{ + for(unsigned i=0; i<16; ++i) + matrix[i] = (i%5 ? 0 : 1); +} + +Matrix::Matrix(const float *m): + flags(IDENTITY) +{ + copy(m, m+16, matrix); + check_flags(); +} + +Matrix::Matrix(const double *m): + flags(IDENTITY) +{ + copy(m, m+16, matrix); + check_flags(); +} + +void Matrix::check_flags() +{ + const double *m = matrix; + if(m[12]!=0 || m[13]!=0 || m[14]!=0) + flags |= TRANSLATE; + if(m[0]!=1) + { + flags |= SCALE; + if(m[5]!=m[0] || m[10]!=m[0]) + flags |= ARBITARY; + } + if(m[1]!=0 || m[2]!=0 || m[4]!=0 || m[6]!=0 || m[8]!=0 || m[9]!=0) + { + flags |= ROTATE; + double x_dot_y = m[0]*m[1]+m[4]*m[5]+m[8]*m[9]; + double x_dot_z = m[0]*m[2]+m[4]*m[6]+m[8]*m[10]; + double y_dot_z = m[1]*m[2]+m[5]*m[6]+m[9]*m[10]; + if(x_dot_y!=0 || x_dot_z!=0 || y_dot_z!=0) + flags |= ARBITARY; + } + if(m[3]!=0 || m[7]!=0 || m[11]!=0 || m[15]!=1) + flags |= ARBITARY; +} + +void Matrix::multiply(const Matrix &other) +{ + *this = *this*other; +} + +void Matrix::translate(double x, double y, double z) +{ + multiply(translation(x, y, z)); +} + +void Matrix::rotate(double a, double x, double y, double z) +{ + multiply(rotation(a, x, y, z)); +} + +void Matrix::rotate_deg(double a, double x, double y, double z) +{ + multiply(rotation_deg(a, x, y, z)); +} + +void Matrix::scale(double s) +{ + multiply(scaling(s)); +} + +void Matrix::scale(double x, double y, double z) +{ + multiply(scaling(x, y, z)); +} + +Matrix Matrix::operator*(const Matrix &other) const +{ + if(flags==IDENTITY) + return other; + else if(other.flags==IDENTITY) + return *this; + else if(flags==TRANSLATE && !(other.flags&ARBITARY)) + { + Matrix result = other; + result.matrix[12] += matrix[12]; + result.matrix[13] += matrix[13]; + result.matrix[14] += matrix[14]; + result.flags |= flags; + return result; + } + else if(!(flags&ARBITARY) && other.flags==TRANSLATE) + { + Matrix result = *this; + const double *m = other.matrix; + result.matrix[12] += matrix[0]*m[12]+matrix[4]*m[13]+matrix[8]*m[14]; + result.matrix[13] += matrix[1]*m[12]+matrix[5]*m[13]+matrix[9]*m[14]; + result.matrix[14] += matrix[2]*m[12]+matrix[6]*m[13]+matrix[10]*m[14]; + result.flags |= other.flags; + return result; + } + else + { + Matrix result; + fill(result.matrix, result.matrix+16, 0.0); + for(unsigned i=0; i<4; ++i) + for(unsigned j=0; j<4; ++j) + for(unsigned k=0; k<4; ++k) + result.matrix[i+j*4] += matrix[i+k*4]*other.matrix[k+j*4]; + result.flags = flags|other.flags; + return result; + } +} + +Matrix &Matrix::operator*=(const Matrix &other) +{ + multiply(other); + return *this; +} + +Vector4 Matrix::operator*(const Vector4 &vec) const +{ + if(flags==IDENTITY) + return vec; + else if(flags==TRANSLATE) + return Vector4(vec.x+vec.w*matrix[12], vec.y+vec.w*matrix[13], vec.z+vec.w*matrix[14], vec.w); + else if(flags==SCALE) + return Vector4(vec.x*matrix[0], vec.y*matrix[5], vec.z*matrix[10], vec.w); + else + { + Vector4 result; + result.x = vec.x*matrix[0]+vec.y*matrix[4]+vec.z*matrix[8]+vec.w*matrix[12]; + result.y = vec.x*matrix[1]+vec.y*matrix[5]+vec.z*matrix[9]+vec.w*matrix[13]; + result.z = vec.x*matrix[2]+vec.y*matrix[6]+vec.z*matrix[10]+vec.w*matrix[14]; + result.w = vec.x*matrix[3]+vec.y*matrix[7]+vec.z*matrix[11]+vec.w*matrix[15]; + return result; + } +} + +double Matrix::operator[](unsigned i) const +{ + if(i>=16) + throw InvalidParameterValue("Matrix element index out of range"); + return matrix[i]; +} + +Matrix Matrix::translation(double x, double y, double z) +{ + Matrix result; + result.matrix[12] = x; + result.matrix[13] = y; + result.matrix[14] = z; + result.flags |= TRANSLATE; + return result; +} + +Matrix Matrix::rotation(double a, double x, double y, double z) +{ + double l = sqrt(x*x+y*y+z*z); + x /= l; + y /= l; + z /= l; + double c = cos(a); + double s = sin(a); + + // http://en.wikipedia.org/wiki/Rotation_matrix#Rotation_matrix_given_an_axis_and_an_angle + Matrix result; + result.matrix[0] = c+x*x*(1-c); + result.matrix[1] = y*x*(1-c)+z*s; + result.matrix[2] = z*x*(1-c)-y*s; + result.matrix[4] = x*y*(1-c)-z*s; + result.matrix[5] = c+y*y*(1-c); + result.matrix[6] = z*y*(1-c)+x*s; + result.matrix[8] = x*z*(1-c)+y*s; + result.matrix[9] = y*z*(1-c)-x*s; + result.matrix[10] = c+z*z*(1-c); + result.flags |= ROTATE; + return result; +} + +Matrix Matrix::rotation_deg(double a, double x, double y, double z) +{ + return rotation(a*M_PI/180, x, y, z); +} + +Matrix Matrix::scaling(double s) +{ + Matrix result; + result.matrix[0] = s; + result.matrix[5] = s; + result.matrix[10] = s; + result.flags |= SCALE; + return result; +} + +Matrix Matrix::scaling(double x, double y, double z) +{ + Matrix result; + result.matrix[0] = x; + result.matrix[5] = y; + result.matrix[10] = z; + result.flags |= SCALE|ARBITARY; + return result; +} + +Matrix Matrix::ortho(double l, double r, double b, double t, double n, double f) +{ + if(l==r || b==t || n==f) + throw InvalidParameterValue("Orthogonal projection can't have zero dimension"); + + Matrix result; + result.matrix[0] = 2/(r-l); + result.matrix[5] = 2/(t-b); + result.matrix[10] = -2/(f-n); + result.matrix[12] = -(r+l)/(r-l); + result.matrix[13] = -(t+b)/(t-b); + result.matrix[14] = -(f+n)/(f-n); + result.flags = TRANSLATE|SCALE|ARBITARY; + return result; +} + +Matrix Matrix::ortho_centered(double w, double h) +{ + return ortho(-w/2, w/2, -h/2, h/2, -1, 1); +} + +Matrix Matrix::ortho_bottomleft(double w, double h) +{ + return ortho(0, w, 0, h, -1, 1); +} + +Matrix Matrix::ortho_topleft(double w, double h) +{ + return ortho(0, w, h, 0, -1, 1); +} + +Matrix Matrix::frustum(double l, double r, double b, double t, double n, double f) +{ + if(l==r || b==t || n<=0 || f<=n) + throw InvalidParameterValue("Invalid frustum parameters"); + + Matrix result; + result.matrix[0] = 2*n/(r-l); + result.matrix[5] = 2*n/(t-b); + result.matrix[8] = (r+l)/(r-l); + result.matrix[9] = (t+b)/(t-b); + result.matrix[10] = -(f+n)/(f-n); + result.matrix[11] = -1; + result.matrix[14] = -2*f*n/(f-n); + result.matrix[15] = 0; + result.flags = ARBITARY; + return result; +} + +Matrix Matrix::frustum_centered(double w, double h, double n, double f) +{ + return frustum(-w/2, w/2, -h/2, h/2, n, f); +} + +Matrix Matrix::perspective(double h, double a, double n, double f) +{ + double hh = tan(h/2)*n; + return frustum(-hh*a, hh*a, -hh, hh, n, f); +} + + +GLenum MatrixStack::current_mode = GL_MODELVIEW; + +MatrixStack::MatrixStack(GLenum m): + mode(m) +{ + matrices.push_back(Matrix()); +} + +MatrixStack::MatrixStack(): + mode(0) +{ + matrices.push_back(Matrix()); +} + +const Matrix &MatrixStack::top() const +{ + return matrices.back(); +} + +void MatrixStack::load(const Matrix &m) +{ + matrices.back() = m; + update(); +} + +void MatrixStack::multiply(const Matrix &m) +{ + matrices.back() *= m; + update(); +} + +void MatrixStack::push() +{ + matrices.push_back(top()); +} + +void MatrixStack::pop() +{ + if(matrices.size()==1) + throw InvalidState("Can't pop the last matrix"); + + matrices.pop_back(); + update(); +} + +void MatrixStack::update() +{ + if(!mode) + return; + + if(mode!=current_mode) + { + glMatrixMode(mode); + current_mode = mode; + } + + glLoadMatrixd(matrices.back().data()); +} + +MatrixStack &MatrixStack::operator=(const Matrix &m) +{ + load(m); + return *this; +} + +MatrixStack &MatrixStack::operator*=(const Matrix &m) +{ + multiply(m); + return *this; +} + +MatrixStack &MatrixStack::modelview() +{ + static MatrixStack ms(GL_MODELVIEW); + return ms; +} + +MatrixStack &MatrixStack::projection() +{ + static MatrixStack ms(GL_PROJECTION); + return ms; +} + + +// Deprecated stuff + +MatrixStack *active_stack = &MatrixStack::modelview(); + void matrix_mode(MatrixMode m) { - glMatrixMode(m); + if(m==MODELVIEW) + active_stack = &MatrixStack::modelview(); + else if(m==PROJECTION) + active_stack = &MatrixStack::projection(); + else + throw InvalidParameterValue("Texture matrices are not supported"); } void load_identity() { - glLoadIdentity(); + *active_stack = Matrix(); +} + +void load_matrix(const float *matrix) +{ + *active_stack = Matrix(matrix); +} + +void load_matrix(const double *matrix) +{ + *active_stack = Matrix(matrix); } void mult_matrix(const float *matrix) { - glMultMatrixf(matrix); + *active_stack *= Matrix(matrix); } void mult_matrix(const double *matrix) { - glMultMatrixd(matrix); + *active_stack *= Matrix(matrix); } void push_matrix() { - glPushMatrix(); + active_stack->push(); } void pop_matrix() { - glPopMatrix(); + active_stack->pop(); +} + +void translate(float x, float y, float z) +{ + *active_stack *= Matrix::translation(x, y, z); +} + +void rotate(float a, float x, float y, float z) +{ + *active_stack *= Matrix::rotation_deg(a, x, y, z); +} + +void scale(float x, float y, float z) +{ + *active_stack *= Matrix::scaling(x, y, z); +} + +void scale_uniform(float s) +{ + *active_stack *= Matrix::scaling(s); } } // namespace GL