+++ /dev/null
-#include <algorithm>
-#include <cmath>
-#include "error.h"
-#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 out_of_range("Matrix::operator[]");
- 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 invalid_argument("Matrix::ortho");
-
- 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 invalid_argument("Matrix::frustum");
-
- 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.reserve(mode==GL_MODELVIEW ? 32 : 4);
- matrices.push_back(Matrix());
-}
-
-MatrixStack::MatrixStack():
- mode(0)
-{
- matrices.reserve(32);
- 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 stack_underflow("MatrixStack::pop()");
-
- 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;
-}
-
-} // namespace GL
-} // namespace Msp
projects / libs / gl.git / blobdiff