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Fixed reorienting

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This commit is contained in:
Muaz Ahmad 2023-05-03 16:14:44 +05:00
parent ae63b108f4
commit 53a10a8b43
2 changed files with 5 additions and 6 deletions
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9
opglwidget.cpp
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@ -28,8 +28,7 @@ void OPGLWidget::initializeGL() {
void OPGLWidget::paintGL() {
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glLoadIdentity();
//reorient();
glTranslatef(0.0f, 0.0f, -10.0f);
reorient();
glPolygonMode(GL_FRONT, GL_FILL);
glBegin(GL_TRIANGLES);
for (int i = 0; i < obj.faces.size(); i++) {
@ -51,13 +50,13 @@ void OPGLWidget::paintGL() {
}
void OPGLWidget::reorient() {
float F_mag = pow(loc[0], 2) + pow(loc[1], 2) +pow(loc[2], 2);
float F_mag = pow(pow(loc[0], 2) + pow(loc[1], 2) +pow(loc[2], 2), 0.5);
GLfloat f[] = {-loc[0]/F_mag, -loc[1] / F_mag, -loc[2] / F_mag};
GLfloat s[] = {-f[2], 0, f[0]};
float s_mag = pow(s[0], 2) + pow(s[1], 2) + pow(s[2], 2);
float s_mag = pow(pow(s[0], 2) + pow(s[1], 2) + pow(s[2], 2), 0.5);
GLfloat u[] = {(s[1] * f[2] - s[2] * f[1]) / s_mag, (s[0] * f[2] - s[2] * f[0]) / s_mag, (s[0] * f[1] - s[1] * f[0]) / s_mag};
GLfloat u[] = {(s[1] * f[2] - s[2] * f[1]) / s_mag, -(s[0] * f[2] - s[2] * f[0]) / s_mag, (s[0] * f[1] - s[1] * f[0]) / s_mag};
const GLfloat m[] = {s[0], u[0], -f[0], 0, s[1], u[1], -f[1], 0, s[2], u[2], -f[2], 0, 0, 0, 0, 1};
glMultMatrixf(m);

2
opglwidget.h
View file

@ -12,6 +12,6 @@ protected:
void reorient();
int mtl_idx = -1;
float loc[3] = {-10, 0, -10};
float loc[3] = {10, 0, 10};
ObjectLoader obj;
};