void quats2matrices( int n ){
float d = 1.0f/n;
glBegin ( GL_POINTS );
glColor3f ( 0.0f, 0.0f, 0.0f );
for( int ix=-n; ix<n; ix++ ){
float x = (ix+0.5f) * d;
for( int iy=-n; iy<n; iy++ ){
float y = (iy+0.5f) * d;
for( int iz=-n; iz<n; iz++ ){
float z = (iz+0.5f) * d;
float r2 = x*x + y*y + z*z;
if( r2 < 1.0f ){
Quat4f q;
Mat3f M;
q.set( x, y, z, sqrt(1.0f - r2) );
q.toMatrix( M );
glColor3f ( M.a.x, M.a.y, M.a.z );
glVertex3f( (float)M.a.x, (float)M.a.y, (float)M.a.z );
//glVertex3f( (float)M.b.x, (float)M.b.y, (float)M.b.z );
//glVertex3f( (float)M.c.x, (float)M.c.y, (float)M.c.z );
}
}
}
}
glEnd();
}
void draw(){
glClearColor(0.0, 0.0, 1.0, 1.0);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );
glEnable( GL_DEPTH_TEST );
glDepthFunc( GL_LESS );
float camMat[16];
getPerspectiveMatrix( -WIDTH, WIDTH, -HEIGHT, HEIGHT, 1.0, 10.0, camMat );
//Quat4f qCamera_; convert(qCamera,qCamera_);
Mat3f mouseMat; qCamera.toMatrix(mouseMat);
//printf( " (%3.3f,%3.3f,%3.3f,%3.3f) \n", qCamera.x,qCamera.y,qCamera.z,qCamera.w );
//printf( " (%3.3f,%3.3f,%3.3f,%3.3f) \n", qCamera.x,qCamera.y,qCamera.z,qCamera.w );
//printf( "mouseMat (%3.3f,%3.3f,%3.3f) (%3.3f,%3.3f,%3.3f) (%3.3f,%3.3f,%3.3f) \n", mouseMat.ax, mouseMat.ay, mouseMat.az, mouseMat.bx, mouseMat.by, mouseMat.bz, mouseMat.cx, mouseMat.cy, mouseMat.cz );
GLuint uloc;
uloc = glGetUniformLocation( shader1->shaderprogram, "modelPos" ); glUniform3fv (uloc, 1, modelPos );
//uloc = glGetUniformLocation( shader1->shaderprogram, "modelMat" ); glUniformMatrix3fv(uloc, 1, GL_FALSE, modelMat );
uloc = glGetUniformLocation( shader1->shaderprogram, "modelMat" ); glUniformMatrix3fv(uloc, 1, GL_FALSE, (float*)&mouseMat );
uloc = glGetUniformLocation( shader1->shaderprogram, "camMat" ); glUniformMatrix4fv(uloc, 1, GL_FALSE, camMat );
// shading
if ( render_type == 1 ){
uloc = glGetUniformLocation( shader1->shaderprogram, "cam_pos" ); glUniform3fv (uloc, 1, cam_pos );
uloc = glGetUniformLocation( shader1->shaderprogram, "light_pos" ); glUniform3fv (uloc, 1, light_pos );
uloc = glGetUniformLocation( shader1->shaderprogram, "lightColor" ); glUniform3fv (uloc, 1, lightColor );
uloc = glGetUniformLocation( shader1->shaderprogram, "diffuseColor" ); glUniform3fv (uloc, 1, diffuseColor );
uloc = glGetUniformLocation( shader1->shaderprogram, "ambientColor" ); glUniform3fv (uloc, 1, ambientColor );
uloc = glGetUniformLocation( shader1->shaderprogram, "specularColor" ); glUniform3fv (uloc, 1, specularColor );
};
//uloc = glGetUniformLocation( shader1->shaderprogram, "light_dir"); glUniform3fv(uloc, 1, light_dir );
object1->draw();
SDL_GL_SwapWindow(window);
}
void draw(){
long time_start = getCPUticks();
glClearColor(0.0, 0.0, 1.0, 1.0);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );
glEnable( GL_DEPTH_TEST );
glDepthFunc( GL_LESS );
long time_0 = getCPUticks();
//getPerspectiveMatrix( -WIDTH, WIDTH, -HEIGHT, HEIGHT, 1.0, 10.0, camMat );
getPerspectiveMatrix( -WIDTH, WIDTH, -HEIGHT, HEIGHT, 1.0, 20.0, camMat );
//Quat4f qCamera_; convert(qCamera,qCamera_);
qCamera.toMatrix(mouseMat);
//printf( " (%3.3f,%3.3f,%3.3f,%3.3f) \n", qCamera.x,qCamera.y,qCamera.z,qCamera.w );
//printf( " (%3.3f,%3.3f,%3.3f,%3.3f) \n", qCamera.x,qCamera.y,qCamera.z,qCamera.w );
//printf( "mouseMat (%3.3f,%3.3f,%3.3f) (%3.3f,%3.3f,%3.3f) (%3.3f,%3.3f,%3.3f) \n", mouseMat.ax, mouseMat.ay, mouseMat.az, mouseMat.bx, mouseMat.by, mouseMat.bz, mouseMat.cx, mouseMat.cy, mouseMat.cz );
// ============= Terrain
if(RayTerrain){
draw_TerrainRayMarch();
}else{
draw_TerrainMeshHeightMap();
}
long time_1 = getCPUticks();
// ============= Objects
glUseProgram(shader1->shaderprogram);
uloc = glGetUniformLocation( shader1->shaderprogram, "camMat" ); glUniformMatrix4fv(uloc, 1, GL_FALSE, camMat );
uloc = glGetUniformLocation( shader1->shaderprogram, "modelMat" ); glUniformMatrix3fv(uloc, 1, GL_FALSE, (float*)&mouseMat );
uloc = glGetUniformLocation( shader1->shaderprogram, "modelPos" ); // glUniform3fv (uloc, 1, modelPos );
//object1->draw();
object1->preDraw();
for(int i=0; i<ninstancs; i++){
glUniform3fv( uloc, 1, instance_points+i*3 );
//glDrawArrays( object1->draw_mode, 0, object1->nVert);
object1->draw_instance();
}
object1->afterDraw();
long time_2 = getCPUticks();
SDL_GL_SwapWindow(window);
long time_3 = getCPUticks();
double Ttot = (time_3-time_start)*1e-6;
double Tterrain = (time_1-time_0)*1e-6;
double Tobject = (time_2-time_1)*1e-6;
double Tswap = (time_3-time_2)*1e-6;
printf( "Ttot %3.2f terrain %3.2f objects %3.2f swap %3.2f \n", Ttot, Tterrain, Tobject, Tswap );
}
