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#include "M_object.h"
#include "M_camera.h"
void M_createViewModel(M_ViewModel *model, int num_vertices, float *vert, int num_indices, unsigned int *indices)
{
model->num_indices = num_indices;
glGenVertexArrays(1, &model->VAO);
glBindVertexArray(model->VAO);
glGenBuffers(1, &model->VBO);
glBindBuffer(GL_ARRAY_BUFFER, model->VBO);
glBufferData(GL_ARRAY_BUFFER, sizeof(float)*num_vertices*3, vert, GL_STATIC_DRAW);
glGenBuffers(1, &model->EBO);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, model->EBO);
glBufferData(GL_ELEMENT_ARRAY_BUFFER, sizeof(unsigned int)*num_indices, indices, GL_STATIC_DRAW);
glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 3 * sizeof(float), (void*)0);
glEnableVertexAttribArray(0);
}
void M_killViewModel(M_ViewModel *model)
{
glDeleteVertexArrays(1, &model->VAO);
glDeleteBuffers(1, &model->VBO);
glDeleteBuffers(1, &model->EBO);
}
M_ViewModel M_loadViewModel(const char* filename)
{
const struct aiScene* scene = aiImportFile(filename,
aiProcess_CalcTangentSpace |
aiProcess_Triangulate |
aiProcess_JoinIdenticalVertices |
aiProcess_SortByPType);
struct aiMesh *mesh = scene->mMeshes[0];
unsigned int *indices = malloc(mesh->mNumFaces*3*sizeof(unsigned int));
int index = 0;
for (unsigned int i=0;i<mesh->mNumFaces;i++) {
memcpy(&indices[index], mesh->mFaces[i].mIndices, 3*sizeof(unsigned int));
index+=3;
}
M_ViewModel model;
M_createViewModel(&model, mesh->mNumVertices, (float*)mesh->mVertices, mesh->mNumFaces*3, indices);
free(indices);
return model;
}
void M_bindViewModel(M_ViewModel *model)
{
glBindVertexArray(model->VAO);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, model->EBO);
}
void M_createObject(M_Object *obj, M_ViewModel *model)
{
obj->model = model;
glm_mat4_identity(obj->transform);
glm_vec3_zero(obj->pos);
glm_vec3_one(obj->size);
obj->rotation.angle = 0.0f;
glm_vec3_zero(obj->rotation.direction);
}
void M_moveObject(M_Object *obj, vec3 pos)
{
glm_vec3_copy(
pos,
obj->pos
);
M_updateObjectTransform(obj);
}
void M_scaleObject(M_Object *obj, vec3 scale)
{
glm_vec3_copy(
scale,
obj->size
);
M_updateObjectTransform(obj);
}
void M_rotateObject(M_Object *obj, float angle, vec3 direction)
{
obj->rotation.angle = angle;
glm_vec3_copy(
direction,
obj->rotation.direction
);
M_updateObjectTransform(obj);
}
inline void M_updateObjectTransform(M_Object *obj)
{
glm_mat4_identity(obj->transform);
glm_translate(obj->transform, obj->pos);
glm_rotate(obj->transform, obj->rotation.angle, obj->rotation.direction);
glm_scale(obj->transform, obj->size);
}
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