mahmad/3dobj-renderer
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Finished rendering code

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This commit is contained in:
Muaz Ahmad 2023-05-03 15:57:59 +05:00
parent 363779f809
commit 131b7cac5e
3 changed files with 27 additions and 6 deletions
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5
obj.cpp
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@ -4,6 +4,7 @@
#include <string>
#include <cstring>
#include <regex>
#include <iostream>
void ObjectLoader::load_mtl(string filename) {
string tmp;
@ -76,9 +77,9 @@ void ObjectLoader::load_obj(string filename) {
regex_search(tmp, match, re);
for (int i = 1; i < 7; i++) {
if (i % 2 == 0) {
faces.back().normals.push_back(&(normals[stoi(match.str(i))]));
faces.back().normals.push_back(&(normals[stoi(match.str(i)) - 1]));
} else {
faces.back().vertices.push_back(&(vertices[stoi(match.str(i))]));
faces.back().vertices.push_back(&(vertices[stoi(match.str(i)) - 1]));
};
};
};

26
opglwidget.cpp
View file

@ -2,7 +2,7 @@
#include <GL/gl.h>
#include <GL/glu.h>
#include <math.h>
#include "obj.h"
#include <iostream>
void OPGLWidget::initializeGL() {
glClearDepth(1.0f);
@ -22,7 +22,6 @@ void OPGLWidget::initializeGL() {
glLightfv(GL_LIGHT0, GL_POSITION, light_position);
glClearColor(0.0f, 0.0f, 0.0f, 1.0f);
ObjectLoader obj;
obj.load_mtl("untitled.mtl");
obj.load_obj("untitled.obj");
}
@ -30,7 +29,26 @@ void OPGLWidget::initializeGL() {
void OPGLWidget::paintGL() {
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glLoadIdentity();
reorient();
//reorient();
glTranslatef(0.0f, 0.0f, -10.0f);
glPolygonMode(GL_FRONT, GL_FILL);
glBegin(GL_TRIANGLES);
for (int i = 0; i < obj.faces.size(); i++) {
Material* mtl_ptr = obj.faces[i].mtl;
if (mtl_idx != mtl_ptr->idx) {
glMaterialfv(GL_FRONT, GL_AMBIENT, mtl_ptr -> ambient);
glMaterialfv(GL_FRONT, GL_DIFFUSE, mtl_ptr -> diffuse);
glMaterialfv(GL_FRONT, GL_SPECULAR, mtl_ptr -> specular);
glMaterialf(GL_FRONT, GL_SHININESS, {128.0f});
mtl_idx =mtl_ptr->idx;
};
for (int j = 0; j < 3; j++) {
glVertex3fv(obj.faces[i].vertices[j] -> pos);
glNormal3fv(obj.faces[i].normals[j] -> dir);
};
};
glEnd();
glFlush();
}
void OPGLWidget::reorient() {
@ -54,6 +72,6 @@ void OPGLWidget::resizeGL(int w, int h) {
float aspect = w / float(h);
float top = 0.2f * tan(M_PI / 8);
float right = 0.2f * tan(M_PI / 8) * aspect;
glFrustum(-right , right, -top, top, 0.1f, 100.0f);
glFrustum(-right, right, -top, top, 0.1f, 100.0f);
glMatrixMode(GL_MODELVIEW);
}

2
opglwidget.h
View file

@ -1,4 +1,5 @@
#include <QtWidgets/QOpenGLWidget>
#include "obj.h"
class OPGLWidget : public QOpenGLWidget
{
@ -12,4 +13,5 @@ protected:
int mtl_idx = -1;
float loc[3] = {-10, 0, -10};
ObjectLoader obj;
};