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Model.cpp
162 lines (128 loc) · 4.81 KB
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Model.cpp
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/**
File: Model.cpp
*/
#include "Model.h"
#include <fstream>
#include <iostream>
#include <queue>
//Model::Model(){}
Model::Model(std::string modelFileName) {
loadRawModel(modelFileName);
}
Model::Model(std::string modelFileName, std::string textureFileName) {
bound = new BoundingBox();
texture = loadTexture(textureFileName);
loadRawModel(modelFileName);
}
Model::~Model() {
}
BoundingBox* Model::getBounds() {
return bound;
}
void Model::loadRawModel(std::string fileName) {
fileName = "Resources/" + fileName;
std::ifstream modelFile(fileName.c_str());
char* tt = new char (10);
while (modelFile.good()) {
triFace *temp = new triFace;
for (int i = 0; i < 3; i++) {
for (int j = 0; j < 3; j++) {
modelFile >> tt;
temp->vertex[i][j] = atof(tt);
//get bounding box around model
if (temp->vertex[i][j] > bound->max[j]) {
bound->max[j] = temp->vertex[i][j];
}
if (temp->vertex[i][j] < bound->min[j]) {
bound->min[j] = temp->vertex[i][j];
}
}
}
faces.push_back(temp);
modelFile.ignore();
}
modelFile.close();
}
void Model::swapTexture(std::string fileName) {
texture = loadTexture(fileName);
}
void Model::Draw() {
glEnable(GL_TEXTURE_2D);
glBindTexture(GL_TEXTURE_2D, texture);
glBegin(GL_TRIANGLES);
for (int i = 0; i < faces.size(); i++) {
glTexCoord2d(0, 0);
glVertex3f(faces[i]->vertex[0].x, faces[i]->vertex[0].y, faces[i]->vertex[0].z);
glTexCoord2d(1, 0);
glVertex3f(faces[i]->vertex[1].x, faces[i]->vertex[1].y, faces[i]->vertex[1].z);
glTexCoord2d(1, 1);
glVertex3f(faces[i]->vertex[2].x, faces[i]->vertex[2].y, faces[i]->vertex[2].z);
}
glEnd();
glDisable(GL_TEXTURE_2D);
}
GLuint Model::loadTexture(std::string fileName) {
glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
GLuint tex;
glGenTextures(1, &tex);
glBindTexture(GL_TEXTURE_2D, tex);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
int w, h;
GLubyte *pixels = (GLubyte *) load_png(fileName, &w, &h);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, w, h, 0, GL_RGBA, GL_UNSIGNED_BYTE, pixels);
free(pixels);
return tex;
}
char* Model::load_png(std::string fileName, int *width, int *height) {
fileName = "Resources/" + fileName;
FILE *png_file = fopen(fileName.c_str(), "rb");
//assert(png_file.open);
uint8_t header[PNG_SIG_BYTES];
fread(header, 1, PNG_SIG_BYTES, png_file);
assert(!png_sig_cmp(header, 0, PNG_SIG_BYTES));
png_structp png_ptr = png_create_read_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL);
assert(png_ptr);
png_infop info_ptr = png_create_info_struct(png_ptr);
assert(info_ptr);
png_infop end_info = png_create_info_struct(png_ptr);
assert(end_info);
assert(!setjmp(png_jmpbuf(png_ptr)));
png_init_io(png_ptr, png_file);
png_set_sig_bytes(png_ptr, PNG_SIG_BYTES);
png_read_info(png_ptr, info_ptr);
*width = png_get_image_width(png_ptr, info_ptr);
*height = png_get_image_height(png_ptr, info_ptr);
png_uint_32 bit_depth, color_type;
bit_depth = png_get_bit_depth(png_ptr, info_ptr);
color_type = png_get_color_type(png_ptr, info_ptr);
// if (color_type == PNG_COLOR_TYPE_GRAY && bit_depth < 8)
// png_set_gray_1_2_4_to_8(png_ptr);
if (bit_depth == 16)
png_set_strip_16(png_ptr);
if (color_type == PNG_COLOR_TYPE_PALETTE)
png_set_palette_to_rgb(png_ptr);
else if (color_type == PNG_COLOR_TYPE_GRAY ||
color_type == PNG_COLOR_TYPE_GRAY_ALPHA) {
png_set_gray_to_rgb(png_ptr);
}
if (png_get_valid(png_ptr, info_ptr, PNG_INFO_tRNS))
png_set_tRNS_to_alpha(png_ptr);
else
png_set_filler(png_ptr, 0xff, PNG_FILLER_AFTER);
png_read_update_info(png_ptr, info_ptr);
png_uint_32 rowbytes = png_get_rowbytes(png_ptr, info_ptr);
png_uint_32 numbytes = rowbytes * (*height);
png_byte* pixels = (png_byte*) malloc(numbytes);
png_byte** row_ptrs = (png_byte**) malloc((*height) * sizeof (png_byte*));
int i;
for (i = 0; i < (*height); i++)
row_ptrs[i] = pixels + ((*height) - 1 - i) * rowbytes;
png_read_image(png_ptr, row_ptrs);
free(row_ptrs);
png_destroy_read_struct(&png_ptr, &info_ptr, &end_info);
fclose(png_file);
return (char *) pixels;
}