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Copy pathassimp_example.cpp
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296 lines (234 loc) · 8.99 KB
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Copy pathassimp_example.cpp
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296 lines (234 loc) · 8.99 KB
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#include "utils.hpp"
#include <GLFW/glfw3.h>
#include "scene.h"
#include <assimp/Importer.hpp>
#include <assimp/postprocess.h>
#include <assimp/scene.h>
#define GLM_FORCE_RADIANS
#include <glm/matrix.hpp>
#include <glm/gtc/matrix_transform.hpp>
#include <glm/gtc/type_ptr.hpp>
#include <iostream>
#include <stdexcept>
#include <sstream>
///////////////////////////////////////////////////////////////////////////////////////
//helpers from util.h out of ogldev tutorial 38
//utility function to count elements in array
#define ARRAY_SIZE_IN_ELEMENTS(a) (sizeof(a)/sizeof(a[0]))
#define SNPRINTF snprintf
#define MAX_BONES 1000
bool hasAnimations = false;
void updateBoneTransforms();
///////////////////////////////////////////////////////////////////////////////////////
//std::vector<struct MyMesh> myMeshes;
// Vertex Attribute Locations
GLuint vertexLoc=0, normalLoc=1, texCoordLoc=2;
//handles for shader
GLuint program = 0;
GLuint modelMatrixUniformLocation = 0;
GLuint viewMatrixUniformLocation = 0;
GLuint projMatrixUniformLocation = 0;
glm::mat4 modelMatrix;
GLFWwindow* window;
Scene scene;
const std::string vertShaderPath = "../shaders/vertexShader.vs";
const std::string fragShaderPath = "../shaders/fragmentShader.fs";
GLuint m_boneLocation[MAX_BONES];
//forward declaration
//void genVAOsAndUniformBuffer(const aiScene*);
bool setUpShader();
bool setUpWindow();
void render();
int main(int argc, char *argv[])
{
std::string fileName = "boblampclean.md5mesh";
if (argc == 2)
{
fileName = argv[1];
}
if(!setUpWindow())
{
return -1;
}
if(!setUpShader())
{
return -1;
}
//scene = Scene();
if (!scene.LoadMesh(fileName)) {
printf("Mesh load failed\n");
return -1;
}
//Now we can access the file's contents.
// std::cout << "Import of scene " << pFile.c_str() << " succeeded." << std::endl;
// std::cout << " contains " << scene->mNumMeshes << " meshes" << std::endl;
// std::cout << " contains " << scene->mNumAnimations << " animations" << std::endl;
for (unsigned int i = 0 ; i < ARRAY_SIZE_IN_ELEMENTS(m_boneLocation) ; i++) {
char Name[128];
memset(Name, 0, sizeof(Name));
SNPRINTF(Name, sizeof(Name), "gBones[%d]", i);
m_boneLocation[i] = glGetUniformLocation(program,Name);
}
//genVAOsAndUniformBuffer(scene);
/* Loop until the user closes the window */
while (!glfwWindowShouldClose(window))
{
render();
}
glfwTerminate();
return 0;
//bulshit
}
void render()
{
glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);
glUseProgram(program);
float time = static_cast<float>(glfwGetTime());
glm::mat4 newModelMatrix = glm::rotate(modelMatrix, time*0.3f, glm::vec3(0.0f, 1.0f, 0.0f) );
glUniformMatrix4fv(modelMatrixUniformLocation, 1, GL_FALSE, glm::value_ptr(newModelMatrix) );
updateBoneTransforms();
scene.Render();
glUseProgram(0);
/* Swap front and back buffers */
glfwSwapBuffers(window);
/* Poll for and process events */
glfwPollEvents();
}
bool setUpWindow()
{
window;
/* Initialize the library */
if (!glfwInit())
return false;
/* Create a windowed mode window and its OpenGL context */
glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3);
glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 3);
glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE);
window = glfwCreateWindow(1024, 800, "Animation with Assimp", NULL, NULL);
if (!window)
{
glfwTerminate();
return false;
}
/* Make the window's context current */
glfwMakeContextCurrent(window);
glewExperimental = GL_TRUE;
GLenum glewError = glewInit();
std::cout << glGetError() << ", glew initeted - but createted GL_INVALID_ENUM, it works not" << std::endl;
glClearColor(0.4,0.4,0.4,1.0);
glEnable(GL_DEPTH_TEST);
return true;
}
bool setUpShader()
{
std::ifstream inFile;
inFile.open(vertShaderPath);
if(inFile.fail())
{
std::cout << "Couldn't open file: " << vertShaderPath << std::endl;
return false;
}
std::stringstream vShaderStream;
vShaderStream << inFile.rdbuf();//read the file
inFile.close();
const std::string strVertexShader = vShaderStream.str();//str holds the content of the file
inFile.open(fragShaderPath);
if(inFile.fail())
{
std::cout << "Couldn't open file: " << fragShaderPath << std::endl;
return false;
}
std::stringstream fShaderStream;
fShaderStream << inFile.rdbuf();//read the file
inFile.close();
const std::string strFragmentShader = fShaderStream.str();//str holds the content of the file
try {
program = createProgram(strVertexShader, strFragmentShader);
} catch (std::logic_error& e) {
std::cerr << e.what() << std::endl;
}
// get uniform locations
glUseProgram(program);
modelMatrixUniformLocation = glGetUniformLocation(program, "modelMatrix");
viewMatrixUniformLocation = glGetUniformLocation(program, "viewMatrix");
projMatrixUniformLocation = glGetUniformLocation(program, "projMatrix");
// generating view / projection / model matrix
//modelMatrix = glm::scale(glm::mat4(1.0), glm::vec3(0.4f) );
//modelMatrix = glm::rotate(modelMatrix, glm::radians(-90.0f), glm::vec3(1.0f, 0.0f, 0.0f) );
glm::mat4 cameraMatrix = glm::translate(glm::mat4(1.0), glm::vec3(0.0, 30.0, 150.0));
glm::mat4 viewMatrix = glm::inverse(cameraMatrix);
glm::mat4 projMatrix = glm::perspectiveFov(glm::radians(60.0f), 1024.0f, 800.0f, 1.0f, 500.0f);
// upload Uniform matrices
glUniformMatrix4fv(modelMatrixUniformLocation, 1, GL_FALSE, glm::value_ptr(modelMatrix) );
glUniformMatrix4fv(viewMatrixUniformLocation , 1, GL_FALSE, glm::value_ptr(viewMatrix) );
glUniformMatrix4fv(projMatrixUniformLocation , 1, GL_FALSE, glm::value_ptr(projMatrix) );
return true;
}
/*void genVAOsAndUniformBuffer(const aiScene *sc) {
struct MyMesh aMesh;
GLuint buffer;
// For each mesh
for (unsigned int n = 0; n < sc->mNumMeshes; ++n)
{
const aiMesh* mesh = sc->mMeshes[n];
std::cout << "mesh " << mesh->mName.data << " has " << mesh->mNumBones << " bones" << std::endl;
// create array with faces
// have to convert from Assimp format to array
unsigned int *faceArray;
faceArray = (unsigned int *)malloc(sizeof(unsigned int) * mesh->mNumFaces * 3);
unsigned int faceIndex = 0;
for (unsigned int t = 0; t < mesh->mNumFaces; ++t) {
const aiFace* face = &mesh->mFaces[t];
memcpy(&faceArray[faceIndex], face->mIndices,3 * sizeof(unsigned int));
faceIndex += 3;
}
aMesh.numFaces = sc->mMeshes[n]->mNumFaces;
// generate Vertex Array for mesh
glGenVertexArrays(1,&(aMesh.vao));
glBindVertexArray(aMesh.vao);
// buffer for faces
glGenBuffers(1, &buffer);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, buffer);
glBufferData(GL_ELEMENT_ARRAY_BUFFER, sizeof(unsigned int) * mesh->mNumFaces * 3, &faceArray[0], GL_STATIC_DRAW);
// buffer for vertex positions
if (mesh->HasPositions()) {
glGenBuffers(1, &buffer);
glBindBuffer(GL_ARRAY_BUFFER, buffer);
glBufferData(GL_ARRAY_BUFFER, sizeof(float)*3*mesh->mNumVertices, mesh->mVertices, GL_STATIC_DRAW);
glEnableVertexAttribArray(vertexLoc);
glVertexAttribPointer(vertexLoc, 3, GL_FLOAT, 0, 0, 0);
}
// buffer for vertex normals
if (mesh->HasNormals()) {
glGenBuffers(1, &buffer);
glBindBuffer(GL_ARRAY_BUFFER, buffer);
glBufferData(GL_ARRAY_BUFFER, sizeof(float)*3*mesh->mNumVertices, mesh->mNormals, GL_STATIC_DRAW);
glEnableVertexAttribArray(normalLoc);
glVertexAttribPointer(normalLoc, 3, GL_FLOAT, 0, 0, 0);
}
// unbind buffers
glBindVertexArray(0);
glBindBuffer(GL_ARRAY_BUFFER,0);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER,0);
myMeshes.push_back(aMesh);
}
}*/
//animation
//////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
void updateBoneTransforms()
{
vector<aiMatrix4x4> Transforms;
scene.BoneTransform(static_cast<float>(glfwGetTime()), Transforms);
for (uint i = 0 ; i < Transforms.size() ; i++) {
assert(i < MAX_BONES);
float currentTranform[4][4] =
{
{Transforms[i].a1, Transforms[i].a2, Transforms[i].a3, Transforms[i].a4},
{Transforms[i].b1, Transforms[i].b2, Transforms[i].b3, Transforms[i].b4},
{Transforms[i].c1, Transforms[i].c2, Transforms[i].c3, Transforms[i].c4},
{Transforms[i].d1, Transforms[i].d2, Transforms[i].d3, Transforms[i].d4},
};
//needs pointer to 4x4 array as last parameter
glUniformMatrix4fv(m_boneLocation[i], 1, GL_TRUE, (const GLfloat*)currentTranform);
}
}
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