bool TexturaBase::_criar(int largura, int altura, int qualidade_escala, EnumTipoTextura tipo)
{
if (criada)
return false;
char buffer[2];
SDL_SetHint(SDL_HINT_RENDER_SCALE_QUALITY, SDL_itoa((int)qualidade_escala, buffer, 10));
sdl_texture = SDL_CreateTexture(gGraficos.sdl_renderer, SDL_PIXELFORMAT_ARGB8888, (int)tipo, largura, altura);
if (!sdl_texture)
return false;
SDL_SetTextureBlendMode(sdl_texture, SDL_BLENDMODE_BLEND);
this->largura = largura;
this->altura = altura;
qualidadeEscala = qualidade_escala;
criada = true;
return true;
}
bool TexturaBase::_criarDoArquivo(const string& arquivo, int qualidade_escala)
{
if (criada)
return false;
char buffer[2];
SDL_SetHint(SDL_HINT_RENDER_SCALE_QUALITY, SDL_itoa((int)qualidade_escala, buffer, 10));
sdl_texture = IMG_LoadTexture(gGraficos.sdl_renderer, arquivo.c_str());
if (!sdl_texture)
return false;
int l, a;
SDL_QueryTexture(sdl_texture, NULL, NULL, &l, &a);
largura = l;
altura = a;
qualidadeEscala = qualidade_escala;
criada = true;
return true;
}
//#define WINDOWED
int main()
{
SDL_Init(SDL_INIT_VIDEO);
SDL_VideoInit(NULL);
SDL_GL_SetAttribute(SDL_GL_CONTEXT_MAJOR_VERSION, 3);
SDL_GL_SetAttribute(SDL_GL_CONTEXT_MINOR_VERSION, 2);
SDL_GL_SetAttribute(SDL_GL_MULTISAMPLEBUFFERS, 1);
SDL_GL_SetAttribute(SDL_GL_MULTISAMPLESAMPLES, 8);
#ifdef WINDOWED
SDL_Window *win = SDL_CreateWindow("hello world", 0, 0,640, 480, SDL_WINDOW_OPENGL);
#define ASPECT 640.0/480
#else
SDL_Window *win = SDL_CreateWindow("hello world", 0, 0,2560, 1440, SDL_WINDOW_OPENGL|SDL_WINDOW_FULLSCREEN);
#define ASPECT 2560.0/1440
#endif
SDL_ShowWindow(win);
SDL_GLContext context_dontneedtosavethis = SDL_GL_CreateContext(win);
SDL_GL_SetSwapInterval(0);
#ifdef WINDOWED
sm_screensize(640,480);
// glViewport(0,0,640,480);
#else
sm_screensize(2560,1440);
// glViewport(0,0,1366,768);
#endif
glEnable(GL_DEPTH_TEST);
glEnable(GL_BLEND);
glBlendFunc (GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
glClearColor(0.3,0.5,1,0);
glClear(GL_COLOR_BUFFER_BIT);
if(sm_load("example"))return;
smm_open("examplemodel.tmd");
GLuint examplemodelvao = smm_upload();
int examplemodelnumtris =smm_numtris();
//========================feedback==============================
if(sm_load("examplefeedback"))return;
smm_open("exampleinstancing.tmd");//load the model to be instanced
GLuint instancedobjectsvao = smm_upload();
int instancedobjectsnumtris = smm_numtris();
glBindVertexArray(instancedobjectsvao);
GLuint instancedobjectspositionvbo;
glGenBuffers(1, &instancedobjectspositionvbo);//this is where we'll put the position offsets generated by the examplefeedback shader
glBindBuffer(GL_ARRAY_BUFFER, instancedobjectspositionvbo);
glBufferData(GL_ARRAY_BUFFER, sizeof(float)*3*500, NULL, GL_DYNAMIC_COPY);//allocate memory on gpu for 500 position vectors
glEnableVertexAttribArray(2);//enables the third attribute (offset)
glVertexAttribPointer(2, 3, GL_FLOAT, GL_FALSE, sizeof(float)*3, 0);//associates the attribute with the location and with the active vbo (instancedobjectspositionvbo)
glVertexAttribDivisor(2, 1);//set attribute 2 (offset) to change per instance instead of per vertex
glBindBuffer(GL_ARRAY_BUFFER, 0);
GLuint feedbackquery;//to count how many instanced objects got through the geometry shader (if used)
glGenQueries(1, &feedbackquery);
//========================/feedback==============================
if(sm_load("examplepp"))return;
if(sm_load("drawtext"))return;
unsigned char printtext[100] = {0};
GLuint textvao, textvbo;//manually setup the vao
glGenVertexArrays(1,&textvao);
glBindVertexArray(textvao);
glGenBuffers(1,&textvbo);
glBindBuffer(GL_ARRAY_BUFFER, textvbo);
glBufferData(GL_ARRAY_BUFFER, /*sizeof(vertexdata)*/strlen(printtext), printtext, GL_STREAM_DRAW);
glEnableVertexAttribArray(0);
glVertexAttribPointer(0, 1, GL_UNSIGNED_BYTE, GL_FALSE, 0, 0);//associates first attribute with vertexdata, also sets source to vbo
float modelviewproj[16];
mat_identity(modelviewproj);
mat_proj2(modelviewproj, 1.7453, ASPECT, 300, 0.1);
long tstart = SDL_GetTicks();
int i;
float rot =0;
float transx=0,transy=-5,transz=5;
float rotmat[16];
float wrot = 0;
float wroty = 0;
float speed = 0.001;
mat_identity(rotmat);
//SDL_SetRelativeMouseMode(SDL_TRUE);//this is not supported on all platforms, warping the mouse is more portable
for(i=0;i>=0;i++)
{
sm_use("example");
glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);
glBindVertexArray(examplemodelvao);
glDrawElements(GL_TRIANGLES, examplemodelnumtris*3, GL_UNSIGNED_SHORT, NULL);
sm_use("examplefeedback");
float wavetime = SDL_GetTicks() * 0.01;
glUniform1fv(sm_uniloc("wavetime"), 1,&wavetime);
glBindBufferBase(GL_TRANSFORM_FEEDBACK_BUFFER, 0, instancedobjectspositionvbo);//set output for transform feedback
glBeginQuery(GL_TRANSFORM_FEEDBACK_PRIMITIVES_WRITTEN, feedbackquery);//start counting
{
glBeginTransformFeedback(GL_POINTS);
{
glDrawArrays(GL_POINTS, 0, 500);//generate 500 position vectors
}glEndTransformFeedback();
}glEndQuery(GL_TRANSFORM_FEEDBACK_PRIMITIVES_WRITTEN);
GLuint feedbacknumgenerated;
glGetQueryObjectuiv(feedbackquery, GL_QUERY_RESULT, &feedbacknumgenerated);//get how many position vectors were generated
sm_use("example");
glBindVertexArray(instancedobjectsvao);
glDrawElementsInstanced(GL_TRIANGLES, instancedobjectsnumtris*3, GL_UNSIGNED_SHORT, NULL, feedbacknumgenerated);//draw the instances
sm_use("examplepp");
glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);
glDrawArrays(GL_POINTS, 0, 1);//we're using attributeless rendering, so we don't need a vao
sm_use("drawtext");
glDisable(GL_DEPTH_TEST);
glBindVertexArray(textvao);
glEnable(GL_DEPTH_TEST);
if(i%5==0)//calculate framerate every 5 frames
{
static long timesincelast;
memset(printtext, 0, 100);
long timethisframe = timesincelast-SDL_GetTicks();
if(timethisframe != 0)
SDL_itoa(1000*5/timethisframe, printtext, 10);
strcat(printtext, "FPS");
timesincelast = SDL_GetTicks();
glBufferData(GL_ARRAY_BUFFER, strlen(printtext), printtext, GL_STREAM_DRAW);//upload the text as an ordinary string
}
glDisable(GL_DEPTH_TEST);
glDrawArrays(GL_POINTS, 0,strlen(printtext));//draw the text to the screen
glEnable(GL_DEPTH_TEST);
SDL_GL_SwapWindow(win);
SDL_Event evt;
while(SDL_PollEvent(&evt))
{
if(evt.type == SDL_QUIT)
i= -i;
}
const char *keys = SDL_GetKeyboardState(NULL);
speed = 0.1;
if(keys[SDL_SCANCODE_LSHIFT])
speed = 2.8;
if(keys[SDL_SCANCODE_W])
{
transz -=speed*cos(wrot);
transx +=speed*sin(wrot);
}
if(keys[SDL_SCANCODE_A])
{
transz +=speed*cos(wrot-1.570796);
transx -=speed*sin(wrot-1.570796);
}
if(keys[SDL_SCANCODE_S])
{
transz +=speed*cos(wrot);
transx -=speed*sin(wrot);
}
if(keys[SDL_SCANCODE_D])
{
transz -=speed*cos(wrot-1.570796);
transx +=speed*sin(wrot-1.570796);
}
if(keys[SDL_SCANCODE_SPACE])
transy -=speed;
if(keys[SDL_SCANCODE_LCTRL])
transy +=speed;
int mousex, mousey;
//SDL_GetRelativeMouseState(&mousex, &mousey);
SDL_GetMouseState(&mousex, &mousey);
SDL_WarpMouseInWindow(win, 400,400);
mousex = mousex-400;
mousey = mousey-400;
wrot -= mousex/1000.0;
wroty-= mousey/1000.0;
wroty = wroty > 1.57?1.57:wroty<-1.57?-1.57:wroty;
float temp[16];
mat_identity(temp);
mat_mul(temp, modelviewproj);
mat_rot(temp, 1,0,0,wroty);
mat_rot(temp, 0,1,0,wrot);
mat_trans(temp, transx, transy, transz);
mat_mul(temp, rotmat);
mat_scale(temp, 10, 10, 10);
sm_use("example");
glUniformMatrix4fv(sm_uniloc("modelviewproj"), 1, GL_TRUE, temp);//upload the model-view-projection matrix
}
i = -i;
printf("last sdl error:%s\n", SDL_GetError());
printf("vendor:%s\n", glGetString(GL_RENDERER));
}
