Index: trunk/src/gfx/particle_engine.cc =================================================================== --- trunk/src/gfx/particle_engine.cc (revision 319) +++ (revision ) @@ -1,830 +1,0 @@ -// Copyright (C) 2014 ChaosForge Ltd -// This file is part of NV Libraries. -// For conditions of distribution and use, see copyright notice in nv.hh - -#include "nv/gfx/particle_engine.hh" - -#include -#include -#include -#include -#include - -static const char *nv_particle_engine_vertex_shader_world = - "#version 120\n" - "attribute vec3 nv_position;\n" - "attribute vec2 nv_texcoord;\n" - "attribute vec4 nv_color;\n" - "varying vec4 v_color;\n" - "varying vec2 v_texcoord;\n" - "uniform mat4 nv_m_view;\n" - "uniform mat4 nv_m_projection;\n" - "void main(void)\n" - "{\n" - " gl_Position = nv_m_projection * nv_m_view * vec4 (nv_position, 1.0);\n" - " v_texcoord = nv_texcoord;\n" - " v_color = nv_color;\n" - "}\n"; -static const char *nv_particle_engine_vertex_shader_local = - "#version 120\n" - "attribute vec3 nv_position;\n" - "attribute vec2 nv_texcoord;\n" - "attribute vec4 nv_color;\n" - "varying vec4 v_color;\n" - "varying vec2 v_texcoord;\n" - "uniform mat4 nv_m_mvp;\n" - "void main(void)\n" - "{\n" - " gl_Position = nv_m_mvp * vec4 (nv_position, 1.0);\n" - " v_texcoord = nv_texcoord;\n" - " v_color = nv_color;\n" - "}\n"; -static const char *nv_particle_engine_fragment_shader = - "#version 120\n" - "uniform sampler2D nv_t_diffuse;\n" - "varying vec4 v_color;\n" - "varying vec2 v_texcoord;\n" - "void main(void)\n" - "{\n" - " vec4 tex_color = texture2D( nv_t_diffuse, v_texcoord );\n" - " gl_FragColor = v_color * tex_color;\n" - "}\n"; - -using namespace nv; - -static void nv_particle_emmiter_point( const particle_emmiter_data*, particle* p, uint32 count ) -{ - for ( uint32 i = 0; i < count; ++i ) - { - p[i].position = vec3(); - } - -} - -static void nv_particle_emmiter_box( const particle_emmiter_data* pe, particle* p, uint32 count ) -{ - random& r = random::get(); - for ( uint32 i = 0; i < count; ++i ) - { - p[i].position = - r.frange( -pe->hextents[0], pe->hextents[0] ) * pe->cdir + - r.frange( 0.0f, pe->extents[1] ) * pe->dir + - r.frange( -pe->hextents[2], pe->hextents[2] ) * pe->odir; - } -} - -static void nv_particle_emmiter_cylinder( const particle_emmiter_data* pe, particle* p, uint32 count ) -{ - random& r = random::get(); - for ( uint32 i = 0; i < count; ++i ) - { - vec2 rellipse( r.disk_point( pe->precise ) * pe->extents[0] ); - p[i].position = - rellipse.x * pe->cdir + - r.frange( 0.0f, pe->extents[1] ) * pe->dir + - rellipse.y * pe->odir; - } -} - -static void nv_particle_emmiter_sphere( const particle_emmiter_data* pe, particle* p, uint32 count ) -{ - random& r = random::get(); - for ( uint32 i = 0; i < count; ++i ) - { - vec3 rsphere = r.sphere_point( pe->precise ) * pe->extents[0]; - p[i].position = - rsphere.x * pe->cdir + - rsphere.y * pe->dir + - rsphere.z * pe->odir; - } -} - -static void nv_particle_emmiter_cylindroid( const particle_emmiter_data* pe, particle* p, uint32 count ) -{ - random& r = random::get(); - for ( uint32 i = 0; i < count; ++i ) - { - vec2 rellipse = r.ellipse_point( vec2( pe->hextents[0], pe->hextents[2] ), pe->precise ); - p[i].position = - rellipse.x * pe->cdir + - r.frange( 0.0f, pe->extents[1] ) * pe->dir + - rellipse.y * pe->odir; - } -} - -static void nv_particle_emmiter_ellipsoid( const particle_emmiter_data* pe, particle* p, uint32 count ) -{ - random& r = random::get(); - for ( uint32 i = 0; i < count; ++i ) - { - vec3 rsphere = r.ellipsoid_point( pe->hextents, pe->precise ); - p[i].position = - rsphere.x * pe->cdir + - rsphere.y * pe->dir + - rsphere.z * pe->odir; - } -} - -static void nv_particle_emmiter_hollow_cylinder( const particle_emmiter_data* pe, particle* p, uint32 count ) -{ - random& r = random::get(); - for ( uint32 i = 0; i < count; ++i ) - { - vec2 rellipse = r.hollow_disk_point( - pe->ihextents[0], - pe->hextents[0], - pe->precise ); - p[i].position = - rellipse.x * pe->cdir + - r.frange( 0.0f, pe->extents[1] ) * pe->dir + - rellipse.y * pe->odir; - } -} - -static void nv_particle_emmiter_hollow_sphere( const particle_emmiter_data* pe, particle* p, uint32 count ) -{ - random& r = random::get(); - for ( uint32 i = 0; i < count; ++i ) - { - vec3 rellipse = r.hollow_sphere_point( pe->ihextents[0], pe->hextents[0], pe->precise ); - p[i].position = - rellipse.x * pe->cdir + - rellipse.y * pe->dir + - rellipse.z * pe->odir; - } -} - -static void nv_particle_emmiter_hollow_cylindroid( const particle_emmiter_data* pe, particle* p, uint32 count ) -{ - random& r = random::get(); - for ( uint32 i = 0; i < count; ++i ) - { - vec2 rellipse = r.hollow_ellipse_point( - vec2( pe->ihextents[0], pe->ihextents[2] ), - vec2( pe->hextents[0], pe->hextents[2] ), - pe->precise ); - p[i].position = - rellipse.x * pe->cdir + - r.frange( 0.0f, pe->extents[1] ) * pe->dir + - rellipse.y * pe->odir; - } -} - -static void nv_particle_emmiter_hollow_ellipsoid( const particle_emmiter_data* pe, particle* p, uint32 count ) -{ - random& r = random::get(); - for ( uint32 i = 0; i < count; ++i ) - { - vec3 rellipse = r.hollow_ellipsoid_point( pe->ihextents, pe->hextents, pe->precise ); - p[i].position = - rellipse.x * pe->cdir + - rellipse.y * pe->dir + - rellipse.z * pe->odir; - } -} - -struct nvpe_linear_force_data -{ - nv::vec3 force_vector; - bool average; -}; - -static bool nv_particle_affector_linear_force_init( lua::table_guard* table, particle_affector_data* data ) -{ - nvpe_linear_force_data* datap = ((nvpe_linear_force_data*)data->paramters); - datap->force_vector = table->get("force_vector", vec3() ); - datap->average = table->get("average", false ); - return true; -} - -static void nv_particle_affector_linear_force( const particle_affector_data* data, particle* p, float factor, uint32 count ) -{ - nvpe_linear_force_data* datap = ((nvpe_linear_force_data*)data->paramters); - if ( datap->average ) - { - float norm_factor = glm::min( factor, 1.0f ); - for ( uint32 i = 0; i < count; ++i ) - p[i].velocity = datap->force_vector * norm_factor + p[i].velocity * ( 1.0f - norm_factor ); - } - else - { - vec3 scvector = datap->force_vector * factor; - for ( uint32 i = 0; i < count; ++i ) p[i].velocity += scvector; - } -} - -struct nvpe_deflector_plane_data -{ - nv::vec3 plane_point; - nv::vec3 plane_normal; - float bounce; - float distance; -}; - -static bool nv_particle_affector_deflector_plane_init( lua::table_guard* table, particle_affector_data* data ) -{ - nvpe_deflector_plane_data* datap = ((nvpe_deflector_plane_data*)data->paramters); - datap->plane_point = table->get("plane_point", vec3() ); - datap->plane_normal = table->get("plane_normal", vec3(0.0f,1.0f,0.0f) ); - datap->plane_normal = normalize_safe( datap->plane_normal, vec3(0.0f,1.0f,0.0f) ); - datap->bounce = table->get("bounce", 0.0f ); - datap->distance = -glm::dot( datap->plane_normal, datap->plane_point ) / glm::sqrt(glm::dot( datap->plane_normal, datap->plane_normal ) ); - return true; -} - -static void nv_particle_affector_deflector_plane( const particle_affector_data* data, particle* p, float factor, uint32 count ) -{ - nvpe_deflector_plane_data* datap = ((nvpe_deflector_plane_data*)data->paramters); - for ( uint32 i = 0; i < count; ++i ) - { - particle& pt = p[i]; - vec3 direction = pt.velocity * factor; - if ( glm::dot( datap->plane_normal, pt.position + direction ) + datap->distance <= 0.0f ) - { - float val = glm::dot( datap->plane_normal, pt.position ) + datap->distance; - if ( val > 0.0f ) - { - vec3 part_dir = direction * ( -val / glm::dot( datap->plane_normal, direction ) ); - pt.position = pt.position + part_dir + ( part_dir - direction ) * datap->bounce; - pt.velocity = glm::reflect( pt.velocity, datap->plane_normal ) * datap->bounce; - } - } - } -} - -struct nvpe_color_fader_data -{ - nv::vec4 adjustment; -}; - -static bool nv_particle_affector_color_fader_init( lua::table_guard* table, particle_affector_data* data ) -{ - nvpe_color_fader_data* datap = ((nvpe_color_fader_data*)data->paramters); - datap->adjustment = table->get("adjustment", vec4() ); - return true; -} - -static void nv_particle_affector_color_fader( const particle_affector_data* data, particle* p, float factor, uint32 count ) -{ - nvpe_color_fader_data* datap = ((nvpe_color_fader_data*)data->paramters); - vec4 adjustment = datap->adjustment * factor; - for ( uint32 i = 0; i < count; ++i ) - { - p[i].color = glm::clamp( p[i].color + adjustment, 0.0f, 1.0f ); - } -} - -struct nvpe_scaler_data -{ - nv::vec2 adjustment; -}; - -static bool nv_particle_affector_scaler_init( lua::table_guard* table, particle_affector_data* data ) -{ - nvpe_scaler_data* datap = ((nvpe_scaler_data*)data->paramters); - float rate = table->get("rate", 0.0f ); - datap->adjustment = table->get("adjustment", vec2(rate,rate) ); - return true; -} - -static void nv_particle_affector_scaler( const particle_affector_data* data, particle* p, float factor, uint32 count ) -{ - nvpe_scaler_data* datap = ((nvpe_scaler_data*)data->paramters); - vec2 adjustment = datap->adjustment * factor; - for ( uint32 i = 0; i < count; ++i ) - { - p[i].size = glm::max( p[i].size + adjustment, vec2() ); - } -} - -void nv::particle_engine::load( lua::table_guard& table ) -{ - std::string id = table.get_string( "id" ); - if ( id == "" ) - { - NV_LOG( LOG_ERROR, "Bad table passed to particle_engine!" ) - } - // TODO : overwrite check - m_names[ id ] = m_data.size(); - - m_data.emplace_back(); - auto& data = m_data.back(); - - data.quota = table.get("quota", 1024 ); - data.local = table.get("local_space", false ); - data.accurate_facing = table.get("accurate_facing", false ); - data.emmiter_count = 0; - data.affector_count = 0; - - std::string orientation = table.get_string( "orientation", "point" ); - if ( orientation == "point" ) { data.orientation = particle_orientation::POINT; } - else if ( orientation == "oriented" ) { data.orientation = particle_orientation::ORIENTED; } - else if ( orientation == "oriented_common" ) { data.orientation = particle_orientation::ORIENTED_COMMON; } - else if ( orientation == "perpendicular" ) { data.orientation = particle_orientation::PERPENDICULAR; } - else if ( orientation == "perpendicular_common" ) { data.orientation = particle_orientation::PERPENDICULAR_COMMON; } - else - { - NV_LOG( LOG_ERROR, "Unknown orientation type! (" << orientation << ")!" ); - data.orientation = particle_orientation::POINT; - } - - std::string origin = table.get_string( "origin", "center" ); - if ( origin == "center" ) { data.origin = particle_origin::CENTER; } - else if ( origin == "top_left" ) { data.origin = particle_origin::TOP_LEFT; } - else if ( origin == "top_center" ) { data.origin = particle_origin::TOP_CENTER; } - else if ( origin == "top_right" ) { data.origin = particle_origin::TOP_RIGHT; } - else if ( origin == "center_left" ) { data.origin = particle_origin::CENTER_LEFT; } - else if ( origin == "center_right" ) { data.origin = particle_origin::CENTER_RIGHT; } - else if ( origin == "bottom_left" ) { data.origin = particle_origin::BOTTOM_LEFT; } - else if ( origin == "bottom_center" ) { data.origin = particle_origin::BOTTOM_CENTER; } - else if ( origin == "bottom_right" ) { data.origin = particle_origin::BOTTOM_RIGHT; } - else - { - NV_LOG( LOG_ERROR, "Unknown particle origin! (" << origin << ")!" ); - data.origin = particle_origin::CENTER; - } - - data.common_up = glm::normalize( table.get("common_up", vec3(1,0,0) ) ); - data.common_dir = glm::normalize( table.get("common_dir", vec3(0,1,0) ) ); - - vec2 def_size = table.get("size", vec2(0.1,0.1) ); - uint32 elements = table.get_size(); - for ( uint32 i = 0; i < elements; ++i ) - { - lua::table_guard element( table, i+1 ); - std::string type = element.get_string("type"); - std::string sub_type = element.get_string("sub_type"); - if ( type == "emmiter" ) - { - if ( data.emmiter_count < MAX_PARTICLE_EMMITERS ) - { - particle_emmiter_data& edata = data.emmiters[ data.emmiter_count ]; - auto emmiter_iter = m_emmiters.find( sub_type ); - if ( emmiter_iter != m_emmiters.end() ) - { - edata.emmiter_func = emmiter_iter->second; - } - else - { - edata.emmiter_func = nv_particle_emmiter_point; - NV_LOG( LOG_WARNING, "Unknown emmiter type in particle system! (" << sub_type << ")" ); - } - - edata.position = element.get("position", vec3() ); - edata.extents = element.get("extents", vec3(1,1,1) ); - edata.extents[0] = element.get("width", edata.extents[0] ); - edata.extents[1] = element.get("depth", edata.extents[1] ); - edata.extents[2] = element.get("height", edata.extents[2] ); - edata.extents[0] = element.get("radius", edata.extents[0] ); - edata.iextents = element.get("inner_extents", vec3() ); - edata.iextents[0] = element.get("inner_width", edata.iextents[0] ); - edata.iextents[1] = element.get("inner_depth", edata.iextents[1] ); - edata.iextents[2] = element.get("inner_height", edata.iextents[2] ); - edata.iextents[0] = element.get("inner_radius", edata.iextents[0] ); - edata.hextents = 0.5f * edata.extents; - edata.ihextents = 0.5f * edata.iextents; - edata.precise = element.get("precise", false ); - edata.square = element.get("square", true ); - vec4 color = element.get("color", vec4(1,1,1,1) ); - edata.color_min = element.get("color_min", color ); - edata.color_max = element.get("color_max", color ); - vec2 size = element.get("size", def_size ); - edata.size_min = element.get("size_min", size ); - edata.size_max = element.get("size_max", size ); - edata.angle = element.get("angle", 0.0f ); - float velocity = element.get("velocity", 0.0f ); - edata.velocity_min = element.get("velocity_min", velocity ); - edata.velocity_max = element.get("velocity_max", velocity ); - float lifetime = element.get("lifetime", 1.0f ); - edata.lifetime_min = uint32( element.get("lifetime_min", lifetime ) * 1000.f ); - edata.lifetime_max = uint32( element.get("lifetime_max", lifetime ) * 1000.f ); - float duration = element.get("duration", 0.0f ); - edata.duration_min = uint32( element.get("duration_min", duration ) * 1000.f ); - edata.duration_max = uint32( element.get("duration_max", duration ) * 1000.f ); - float repeat = element.get("repeat_delay", 0.0f ); - edata.repeat_min = uint32( element.get("repeat_delay_min", repeat ) * 1000.f ); - edata.repeat_max = uint32( element.get("repeat_delay_max", repeat ) * 1000.f ); - - edata.rate = element.get("rate", 1.0f ); - edata.dir = glm::normalize( element.get("direction", vec3(0,1,0) ) ); - - edata.odir = glm::vec3( 0, 0, 1 ); - if ( edata.dir != vec3( 0, 1, 0 ) && edata.dir != vec3( 0, -1, 0 ) ) - edata.odir = glm::normalize( glm::cross( edata.dir, vec3( 0, 1, 0 ) ) ); edata.cdir = glm::cross( edata.dir, edata.odir ); - - data.emmiter_count++; - } - else - { - NV_LOG( LOG_ERROR, "Too many emmiters (" << MAX_PARTICLE_EMMITERS << " is MAX)!" ); - } - } - else if ( type == "affector" ) - { - if ( data.affector_count < MAX_PARTICLE_AFFECTORS ) - { - particle_affector_data& adata = data.affectors[ data.affector_count ]; - data.affector_count++; - auto affector_iter = m_affectors.find( sub_type ); - if ( affector_iter != m_affectors.end() ) - { - adata.process = affector_iter->second.process; - if ( !affector_iter->second.init( &element, &adata ) ) - { - data.affector_count--; - NV_LOG( LOG_WARNING, "Bad data passed to " << sub_type << " affector in particle system!" ); - } - } - else - { - data.affector_count--; - NV_LOG( LOG_WARNING, "Unknown affector type in particle system! (" << sub_type << ")" ); - } - } - else - { - NV_LOG( LOG_ERROR, "Too many affectors (" << MAX_PARTICLE_AFFECTORS << " is MAX)!" ); - } - } - else - { - NV_LOG( LOG_WARNING, "Unknown element in particle system! (" << type << ")" ); - } - } - -} - -nv::particle_engine::particle_engine( context* a_context ) -{ - m_context = a_context; - m_device = a_context->get_device(); - m_program_local = m_device->create_program( nv_particle_engine_vertex_shader_local, nv_particle_engine_fragment_shader ); - m_program_world = m_device->create_program( nv_particle_engine_vertex_shader_world, nv_particle_engine_fragment_shader ); - - register_standard_emmiters(); - register_standard_affectors(); -} - -nv::particle_system nv::particle_engine::create_system( const std::string& id ) -{ - auto it = m_names.find( id ); - if ( it == m_names.end() ) - { - return particle_system(); - } - const particle_system_data* data = &(m_data[it->second]); - particle_system result = m_systems.create(); - particle_system_info* info = m_systems.get( result ); - - info->data = data; - uint32 ecount = data->emmiter_count; - for ( uint32 i = 0; i < ecount; ++i ) - { - info->emmiters[i].active = true; - info->emmiters[i].last_create = 0; - info->emmiters[i].next_toggle = random::get().urange( data->emmiters[i].duration_min, data->emmiters[i].duration_max ); - } - - info->count = 0; - info->particles = new particle[ data->quota ]; - info->quads = new particle_quad[ data->quota ]; - info->vtx_array = m_context->create_vertex_array( - (particle_vtx*)info->quads, data->quota*6, STREAM_DRAW ); - info->vtx_buffer = m_context->find_buffer( info->vtx_array, slot::POSITION ); - info->last_update = 0; - info->test = false; -// result->m_own_va = true; -// result->m_offset = 0; - - return result; -} - -void nv::particle_engine::draw( particle_system system, const render_state& rs, const scene_state& ss ) -{ - particle_system_info* info = m_systems.get( system ); - if ( info ) - { - m_context->draw( nv::TRIANGLES, rs, ss, info->data->local ? m_program_local : m_program_world, info->vtx_array, info->count * 6 ); - } -} - -nv::particle_engine::~particle_engine() -{ - m_device->release( m_program_world ); - m_device->release( m_program_local ); -} - -void nv::particle_engine::release( particle_system system ) -{ - particle_system_info* info = m_systems.get( system ); - if ( info ) - { - delete[] info->particles; - delete[] info->quads; - //if ( system->own_va ) - m_context->release( info->vtx_array ); - m_systems.destroy( system ); - } -} - -void nv::particle_engine::update( particle_system system, const scene_state& s, uint32 ms ) -{ - particle_system_info* info = m_systems.get( system ); - if ( info ) - { - m_view_matrix = s.get_view(); - m_model_matrix = s.get_model(); - m_camera_pos = s.get_camera().get_position(); - m_inv_view_dir = glm::normalize(-s.get_camera().get_direction()); - - update_emmiters( info, ms ); - destroy_particles( info, ms ); - create_particles( info, ms ); - update_particles( info, ms ); - - generate_data( info ); - m_context->update( info->vtx_buffer, info->quads, /*system->m_offset*sizeof(particle_quad)*/ 0, info->count*sizeof(particle_quad) ); - } -} - -void nv::particle_engine::set_texcoords( particle_system system, vec2 a, vec2 b ) -{ - particle_system_info* info = m_systems.get( system ); - if ( info ) - { - vec2 texcoords[4] = { a, vec2( b.x, a.y ), vec2( a.x, b.y ), b }; - - for ( uint32 i = 0; i < info->data->quota; ++i ) - { - particle_quad& rdata = info->quads[i]; - rdata.data[0].texcoord = texcoords[0]; - rdata.data[1].texcoord = texcoords[1]; - rdata.data[2].texcoord = texcoords[2]; - rdata.data[3].texcoord = texcoords[3]; - rdata.data[4].texcoord = texcoords[2]; - rdata.data[5].texcoord = texcoords[1]; - } - } -} - -void nv::particle_engine::generate_data( particle_system_info* info ) -{ - vec2 lb = vec2( -0.5f, -0.5f ); - vec2 rt = vec2( 0.5f, 0.5f ); - - switch ( info->data->origin ) - { - case particle_origin::CENTER : break; - case particle_origin::TOP_LEFT : lb = vec2(0.f,-1.f); rt = vec2(1.f,0.f); break; - case particle_origin::TOP_CENTER : lb.y = -1.f; rt.y = 0.f; break; break; - case particle_origin::TOP_RIGHT : lb = vec2(-1.f,-1.f); rt = vec2(); break; - case particle_origin::CENTER_LEFT : lb.x = 0.f; rt.x = 1.f; break; - case particle_origin::CENTER_RIGHT : lb.x = -1.f; rt.x = 0.f; break; - case particle_origin::BOTTOM_LEFT : lb = vec2(); rt = vec2(1.f,1.f); break; - case particle_origin::BOTTOM_CENTER : lb.y = 0.f; rt.y = 1.f; break; - case particle_origin::BOTTOM_RIGHT : lb = vec2(-1.f,0.f); rt = vec2(.0f,1.f); break; - } - - const vec3 sm[4] = - { - vec3( lb.x, lb.y, 0.0f ), - vec3( rt.x, lb.y, 0.0f ), - vec3( lb.x, rt.y, 0.0f ), - vec3( rt.x, rt.y, 0.0f ), - }; - vec3 z( 0.0f, 0.0f ,1.0f ); - - particle_orientation orientation = info->data->orientation; - vec3 common_up ( info->data->common_up ); - vec3 common_dir( info->data->common_dir ); - bool accurate_facing = info->data->accurate_facing; - mat3 rot_mat; - vec3 right; - vec3 pdir( 0.0f, 1.0f, 0.0f ); - - for ( uint32 i = 0; i < info->count; ++i ) - { - const particle& pdata = info->particles[i]; - particle_quad& rdata = info->quads[i]; - - vec3 view_dir( m_inv_view_dir ); - if ( accurate_facing ) view_dir = glm::normalize( m_camera_pos - pdata.position ); - - switch ( orientation ) - { - case particle_orientation::POINT : - right = glm::normalize( glm::cross( view_dir, vec3( 0, 1, 0 ) ) ); - rot_mat = mat3( right, glm::cross( right, -view_dir ), -view_dir ); - break; - case particle_orientation::ORIENTED : - pdir = normalize_safe( pdata.velocity, pdir ); - right = glm::normalize( glm::cross( pdir, view_dir ) ); - rot_mat = mat3( right, pdir, glm::cross( pdir, right ) ); - break; - case particle_orientation::ORIENTED_COMMON : - right = glm::normalize( glm::cross( common_dir, view_dir ) ); - rot_mat = mat3( right, common_dir, glm::cross( common_dir, right ) ); - break; - case particle_orientation::PERPENDICULAR : - pdir = normalize_safe( pdata.velocity, pdir ); - right = glm::normalize( glm::cross( common_up, pdir ) ); - rot_mat = mat3( right, common_up, glm::cross( common_up, right ) ); - break; - case particle_orientation::PERPENDICULAR_COMMON : - right = glm::normalize( glm::cross( common_up, common_dir ) ); - rot_mat = mat3( right, common_up, glm::cross( common_up, right ) ); - break; - } - - vec3 size( pdata.size.x, pdata.size.y, 0.0f ); - vec3 s0 = rot_mat * ( ( size * sm[0] ) ); - vec3 s1 = rot_mat * ( ( size * sm[1] ) ); - vec3 s2 = rot_mat * ( ( size * sm[2] ) ); - vec3 s3 = rot_mat * ( ( size * sm[3] ) ); - - rdata.data[0].position = pdata.position + s0; - rdata.data[0].color = pdata.color; - - rdata.data[1].position = pdata.position + s1; - rdata.data[1].color = pdata.color; - - rdata.data[2].position = pdata.position + s2; - rdata.data[2].color = pdata.color; - - rdata.data[3].position = pdata.position + s3; - rdata.data[3].color = pdata.color; - - rdata.data[4] = rdata.data[2]; - rdata.data[5] = rdata.data[1]; - } -} - -void nv::particle_engine::destroy_particles( particle_system_info* info, uint32 ms ) -{ - if ( info->count > 0 ) - for ( sint32 i = info->count-1; i >= 0; --i ) - { - particle& pinfo = info->particles[i]; - if ( //pdata.position.y < 0.0f || - ms >= pinfo.death ) - { - info->count--; - std::swap( info->particles[i], info->particles[info->count] ); - } - } -} - -void nv::particle_engine::create_particles( particle_system_info* info, uint32 ms ) -{ - uint32 ecount = info->data->emmiter_count; - if ( ecount == 0 ) return; - - random& r = random::get(); - vec3 source; - mat3 orient; - bool local = info->data->local; - if ( !local ) - { - source = vec3( m_model_matrix[3] ); - orient = mat3( m_model_matrix ); - } - - float fms = float(ms); - - for ( uint32 i = 0; i < ecount; ++i ) - { - const auto& edata = info->data->emmiters[i]; - auto& einfo = info->emmiters[i]; - if ( einfo.active ) - { - float period = 1000.f / edata.rate; - while ( fms - einfo.last_create > period ) - { - if ( info->count < info->data->quota-1 ) - { - particle& pinfo = info->particles[info->count]; - edata.emmiter_func( &(info->data->emmiters[i]), &pinfo, 1 ); - - if ( !local ) pinfo.position = orient * pinfo.position + source; - pinfo.position += edata.position; - pinfo.color = edata.color_min == edata.color_max ? - edata.color_min : r.range( edata.color_min, edata.color_max ); - pinfo.size = edata.size_min == edata.size_max ? - edata.size_min : r.range( edata.size_min, edata.size_max ); - if ( edata.square ) pinfo.size.y = pinfo.size.x; - float velocity = edata.velocity_min == edata.velocity_max ? - edata.velocity_min : r.frange( edata.velocity_min, edata.velocity_max ); - pinfo.death = ms + ( edata.lifetime_min == edata.lifetime_max ? - edata.lifetime_min : r.urange( edata.lifetime_min, edata.lifetime_max ) ); - //pinfo.rotation = r.frand( 360.0f ); - - pinfo.velocity = edata.dir; - if ( edata.angle > 0.0f ) - { - float emission_angle = glm::radians( edata.angle ); - float cos_theta = r.frange( cos( emission_angle ), 1.0f ); - float sin_theta = glm::sqrt(1.0f - cos_theta * cos_theta ); - float phi = r.frange( 0.0f, 2*glm::pi() ); - pinfo.velocity = orient * - ( edata.odir * ( glm::cos(phi) * sin_theta ) + - edata.cdir * ( glm::sin(phi)*sin_theta ) + - edata.dir * cos_theta ); - } - - pinfo.velocity *= velocity; - - info->count++; - } - einfo.last_create += period; - } - } - } -} - -void nv::particle_engine::update_particles( particle_system_info* info, uint32 ms ) -{ - uint32 ticks = ms - info->last_update; - if ( ticks == 0 ) return; - float factor = 0.001f * ticks; - - uint32 acount = info->data->affector_count; - for ( uint32 i = 0; i < acount; ++i ) - { - const particle_affector_data* padata = &(info->data->affectors[i]); - padata->process( padata, info->particles, factor, info->count ); - } - - - for ( uint32 i = 0; i < info->count; ++i ) - { - particle& pdata = info->particles[i]; - pdata.position += pdata.velocity * factor; - } - info->last_update = ms; -} - -void nv::particle_engine::update_emmiters( particle_system_info* info, uint32 ms ) -{ - uint32 ecount = info->data->emmiter_count; - if ( ecount == 0 ) return; - random& r = random::get(); - - for ( uint32 i = 0; i < ecount; ++i ) - { - const auto& edata = info->data->emmiters[i]; - auto& einfo = info->emmiters[i]; - - if ( einfo.next_toggle != 0 && ms >= einfo.next_toggle ) - { - if ( einfo.active ) - { - einfo.active = false; - if ( edata.repeat_min > 0 ) - einfo.next_toggle += r.urange( edata.repeat_min, edata.repeat_max ); - else - einfo.next_toggle = 0; - } - else - { - einfo.active = true; - einfo.last_create = float( einfo.next_toggle ); - einfo.next_toggle += r.urange( edata.duration_min, edata.duration_max ); - } - } - } - -} - -void nv::particle_engine::register_emmiter_type( const std::string& name, particle_emmiter_func func ) -{ - m_emmiters[ name ] = func; -} - -void nv::particle_engine::register_standard_emmiters() -{ - register_emmiter_type( "point", nv_particle_emmiter_point ); - register_emmiter_type( "box", nv_particle_emmiter_box ); - register_emmiter_type( "cylinder", nv_particle_emmiter_cylinder ); - register_emmiter_type( "sphere", nv_particle_emmiter_sphere ); - register_emmiter_type( "cylindroid", nv_particle_emmiter_cylindroid ); - register_emmiter_type( "ellipsoid", nv_particle_emmiter_ellipsoid ); - register_emmiter_type( "hollow_cylinder", nv_particle_emmiter_hollow_cylinder ); - register_emmiter_type( "hollow_sphere", nv_particle_emmiter_hollow_sphere ); - register_emmiter_type( "hollow_cylindroid", nv_particle_emmiter_hollow_cylindroid ); - register_emmiter_type( "hollow_ellipsoid", nv_particle_emmiter_hollow_ellipsoid ); -} - -void nv::particle_engine::register_affector_type( const std::string& name, particle_affector_init_func init, particle_affector_func process ) -{ - m_affectors[ name ].init = init; - m_affectors[ name ].process = process; -} - -void nv::particle_engine::register_standard_affectors() -{ - register_affector_type( "linear_force", nv_particle_affector_linear_force_init, nv_particle_affector_linear_force ); - register_affector_type( "deflector_plane", nv_particle_affector_deflector_plane_init, nv_particle_affector_deflector_plane ); - register_affector_type( "color_fader", nv_particle_affector_color_fader_init, nv_particle_affector_color_fader ); - register_affector_type( "scaler", nv_particle_affector_scaler_init, nv_particle_affector_scaler ); -} -