void Batch3DGeometry::init(Camera3D* cam) {
set_camera(cam);
create_vertex_array();
m_mesh_manager = MeshManager::get_instance();
indices.resize(0);
input_instances = nullptr;
}
void Batch3DGeometry::begin() {
m_render_batches.clear();
free(input_instances);
m_models.clear();
shaders.clear();
create_vertex_array();
}
std::shared_ptr<VertexArray>
RenderContext::create_vertex_array(const std::shared_ptr<geo::Mesh>& pMesh)
{
auto va = create_vertex_array();
va->bind();
//read all attributes and create vertex buffers
auto attribs = pMesh->vertex_attrib_array();
for (u32 i = 0; i < attribs.size(); ++i)
{
i32 n_comp;
ComponentDatatype datatype;
switch (attribs[i]->type())
{
case VertexAttribType::FLOAT32:
n_comp = 1;
datatype = ComponentDatatype::FLOAT32;
break;
case VertexAttribType::FLOAT32_2:
n_comp = 2;
datatype = ComponentDatatype::FLOAT32;
break;
case VertexAttribType::FLOAT32_3:
n_comp = 3;
datatype = ComponentDatatype::FLOAT32;
break;
case VertexAttribType::FLOAT32_4:
n_comp = 4;
datatype = ComponentDatatype::FLOAT32;
break;
default:
R_LOG_ERR("Unknown attribute type.");
}
u32 buffersize = attribs[i]->size_in_bytes();
auto vbo = Device::graphics()->create_vertex_buffer(BufferHint::STATIC, buffersize);
vbo->copy_raw_from_sys_mem(attribs[i]->raw_data_ptr(), 0, buffersize);
auto& pAttrib = va->create_attrib(i, attribs[i]->name(), vbo, datatype, n_comp);
}
auto indexsize = pMesh->indices<u32>()->size_in_bytes();
auto ibo = Device::graphics()->create_index_buffer(BufferHint::STATIC, indexsize);
ibo->copy_from_sys_mem(pMesh->indices<u32>()->data());
va->set_index_buffer(ibo);
return va;
}
NE_API drawing_shape_id create_quad_array() {
shapes.push_back(gl_drawing_shape());
drawing_shape_id shape_id = (drawing_shape_id) shapes.size() - 1;
gl_drawing_shape* quad = &shapes[shape_id];
gl_vertex_array* vertex_array = &quad->vertex_array;
create_vertex_array(vertex_array);
create_gl_buffer(&vertex_array->index_buffer);
create_gl_buffer(&vertex_array->vertex_buffer);
bind_vertex_array(vertex_array);
set_vertex_attribute(vertex_attribute::position, 4, sizeof(vertex), nullptr);
set_vertex_attribute(vertex_attribute::color, 4, sizeof(vertex), (void*) (4 * sizeof(float)));
set_vertex_attribute(vertex_attribute::tangent, 3, sizeof(vertex), (void*) (8 * sizeof(float)));
set_vertex_attribute(vertex_attribute::normal, 3, sizeof(vertex), (void*) (11 * sizeof(float)));
set_vertex_attribute(vertex_attribute::tex_coords, 2, sizeof(vertex), (void*) (14 * sizeof(float)));
return (drawing_shape_id) (shapes.size() - 1);
}
NE_API drawing_shape_id create_quad() {
shapes.push_back(gl_drawing_shape());
drawing_shape_id shape_id = (drawing_shape_id) shapes.size() - 1;
gl_drawing_shape* quad = &shapes[shape_id];
gl_vertex_array* vertex_array = &quad->vertex_array;
create_vertex_array(vertex_array);
quad->vertices.insert(quad->vertices.begin(), 4, vertex());
quad->indices = { 0, 1, 2, 3, 2, 0 };
quad->vertices[0].position = { 0.0f, 0.0f, 0.0f, 1.0f };
quad->vertices[1].position = { 1.0f, 0.0f, 0.0f, 1.0f };
quad->vertices[2].position = { 1.0f, 1.0f, 0.0f, 1.0f };
quad->vertices[3].position = { 0.0f, 1.0f, 0.0f, 1.0f };
quad->vertices[0].color = { 1.0f, 1.0f, 1.0f, 1.0f };
quad->vertices[1].color = { 1.0f, 1.0f, 1.0f, 1.0f };
quad->vertices[2].color = { 1.0f, 1.0f, 1.0f, 1.0f };
quad->vertices[3].color = { 1.0f, 1.0f, 1.0f, 1.0f };
vertex_array->index_count = 6;
create_gl_buffer(&vertex_array->index_buffer);
set_gl_buffer_memory(&vertex_array->index_buffer, (uint8*) &quad->indices[0], 6 * sizeof(uint32));
upload_gl_buffer_data(&vertex_array->index_buffer);
create_gl_buffer(&vertex_array->vertex_buffer);
set_gl_buffer_memory(&vertex_array->vertex_buffer, (uint8*) &quad->vertices[0], 4 * sizeof(vertex));
set_quad_tex_coords(shape_id, 0.0f, 0.0f, 1.0f, 1.0f);
bind_vertex_array(vertex_array);
set_vertex_attribute(vertex_attribute::position, 4, sizeof(vertex), nullptr);
set_vertex_attribute(vertex_attribute::color, 4, sizeof(vertex), (void*) (4 * sizeof(float)));
set_vertex_attribute(vertex_attribute::tangent, 3, sizeof(vertex), (void*) (8 * sizeof(float)));
set_vertex_attribute(vertex_attribute::normal, 3, sizeof(vertex), (void*) (11 * sizeof(float)));
set_vertex_attribute(vertex_attribute::tex_coords, 2, sizeof(vertex), (void*) (14 * sizeof(float)));
return (drawing_shape_id) (shapes.size() - 1);
}
int main() {
srand(time(0));
for (int i = 0; i < 3; i++)
gColor[i] = random_float();
signal(SIGINT, signal_handler);
SDL_Init(SDL_INIT_VIDEO);
SDL_GL_SetAttribute(SDL_GL_CONTEXT_MAJOR_VERSION, 3);
SDL_GL_SetAttribute(SDL_GL_CONTEXT_MINOR_VERSION, 2);
SDL_GL_SetAttribute(SDL_GL_DOUBLEBUFFER, 1);
SDL_GL_SetAttribute(SDL_GL_DEPTH_SIZE, 24);
/* Create our window centered at 512x512 resolution */
gWindow = SDL_CreateWindow("Hello Triangle",
SDL_WINDOWPOS_CENTERED,
SDL_WINDOWPOS_CENTERED,
800,
600,
SDL_WINDOW_OPENGL | SDL_WINDOW_SHOWN);
SDL_GL_CreateContext(gWindow);
SDL_GL_SetSwapInterval(1);
/* create a black box context */
if (!bbgl_init(&bbgl)) {
fprintf(stderr, "[bbgl] (client) failed to connect to black box\n");
return -1;
}
glViewport(0, 0, 800, 600);
glClearColor(0.0f, 0.0f, 1.0f, 1.0f);
//const char *vendor = (const char *)glGetString(GL_VENDOR);
//const char *renderer = (const char *)glGetString(GL_RENDERER);
//const char *version = (const char *)glGetString(GL_VERSION);
//const char *shading = (const char *)glGetString(GL_SHADING_LANGUAGE_VERSION);
//printf("vendor: %s\n", vendor);
//printf("renderer: %s\n", renderer);
//printf("version: %s\n", version);
//printf("shading: %s\n", shading);
create_vertex_array();
create_vertex_buffer();
compile_shaders();
int frames = 0;
Uint32 start = SDL_GetTicks();
int dirs[3] = { +1, +1, +1 };
while (gRunning) {
++frames;
Uint32 elapsed = SDL_GetTicks() - start;
if (elapsed) {
double seconds = elapsed / 1000.0;
double fps = frames / seconds;
printf("\r%g FPS\n", fps);
}
SDL_Event e;
while (SDL_PollEvent(&e)) {
switch (e.type) {
case SDL_QUIT:
gRunning = 0;
break;
}
}
render();
for (int i = 0; i < 3; i++) {
int value = ((int)(gColor[i] * 255.0f)+dirs[i]);
if (value > 255 || value <= 0)
dirs[i] = -dirs[i];
gColor[i] = value/255.0f;
}
}
bbgl_destroy(&bbgl);
return 0;
}