1.1 --- a/src/scene.c Fri Mar 29 00:03:25 2024 +0100
1.2 +++ b/src/scene.c Mon Apr 01 18:54:19 2024 +0200
1.3 @@ -30,6 +30,8 @@
1.4
1.5 #include "ascension/context.h"
1.6
1.7 +#include <cx/linked_list.h>
1.8 +#include <cx/array_list.h>
1.9 #include <cx/tree.h>
1.10 #include <cx/utils.h>
1.11
1.12 @@ -56,53 +58,26 @@
1.13 );
1.14 }
1.15
1.16 -void asc_scene_init(AscScene *scene) {
1.17 - if (scene->root != NULL) {
1.18 - asc_error("Scene is already initialized.");
1.19 - return;
1.20 +struct asc_render_group_entry {
1.21 + asc_scene_draw_func draw;
1.22 + AscSceneNode const *node;
1.23 +};
1.24 +
1.25 +#define asc_draw_render_group(iter) \
1.26 + cx_foreach(struct asc_render_group_entry*, entry, iter) { \
1.27 + entry->draw(entry->node); \
1.28 }
1.29
1.30 - // zero everything, first
1.31 - memset(scene, 0, sizeof(AscScene));
1.32 -
1.33 - // default viewport is the entire viewport of the active window
1.34 - scene->viewport.size = asc_context.active_window->dimensions;
1.35 -
1.36 - // create the root node
1.37 - scene->root = asc_scene_node_empty();
1.38 -
1.39 - // initialize the render groups
1.40 - cx_array_initialize(scene->rg_sprites_opaque, 8);
1.41 - cx_array_initialize(scene->rg_sprites_blended, 8);
1.42 -}
1.43 -
1.44 -void asc_scene_destroy(AscScene *scene) {
1.45 - asc_scene_node_free(scene->root);
1.46 -}
1.47 -
1.48 -void asc_scene_add(AscScene *scene, AscSceneNode *node) {
1.49 - asc_scene_node_link(scene->root, node);
1.50 - asc_node_update(node);
1.51 -}
1.52 -
1.53 -#define asc_scene_draw_render_group(rg) \
1.54 - cx_for_n(i, rg##_size) { \
1.55 - rg[i].draw(rg[i].node); \
1.56 - } (void)0
1.57 -
1.58 -#define asc_scene_draw_render_group_reversed(rg) \
1.59 - for(size_t i = rg##_size ; i > 0 ; i--) { \
1.60 - rg[i-1].draw(rg[i-1].node); \
1.61 - } (void)0
1.62 -
1.63 -void asc_scene_draw(AscScene *scene) {
1.64 - // reset render groups
1.65 - // TODO: avoid recalculating the groups, if possible
1.66 - scene->rg_sprites_opaque_size = 0;
1.67 - scene->rg_sprites_blended_size = 0;
1.68 +void asc_scene_draw(AscSceneNode *root, asc_recti viewport, AscCamera *camera) {
1.69 + // create render groups
1.70 + CxList *render_group[ASC_RENDER_GROUP_COUNT];
1.71 + cx_for_n(i, ASC_RENDER_GROUP_COUNT) {
1.72 + render_group[i] = cxArrayListCreateSimple(
1.73 + sizeof(struct asc_render_group_entry), 32);
1.74 + }
1.75
1.76 // skip the root node deliberately, we know it's just the container
1.77 - CxTreeVisitor iter = asc_scene_node_visitor(scene->root);
1.78 + CxTreeVisitor iter = asc_scene_node_visitor(root);
1.79 cxIteratorNext(iter);
1.80
1.81 // update the children and add them to the render groups
1.82 @@ -110,12 +85,16 @@
1.83 node->depth = iter.depth;
1.84
1.85 // execute behaviors, first
1.86 - AscBehaviorNode *behavior = node->behaviors;
1.87 - while (behavior) {
1.88 - behavior->func(node);
1.89 - behavior = behavior->next;
1.90 + if (node->behaviors != NULL) {
1.91 + CxIterator behavior_iter = cxListIterator(node->behaviors);
1.92 + cx_foreach(asc_scene_update_func, behavior, behavior_iter) {
1.93 + behavior(node);
1.94 + }
1.95 }
1.96
1.97 + // TODO: implement culling
1.98 + // TODO: implement a hidden flag (requires UCX tree-continue function)
1.99 +
1.100 // check if geometry needs update
1.101 if (node->need_graphics_update) {
1.102 assert(node->update_func != NULL);
1.103 @@ -142,56 +121,51 @@
1.104 struct asc_render_group_entry entry = {
1.105 node->draw_func, node
1.106 };
1.107 - switch (node->render_group) {
1.108 - case ASC_RENDER_GROUP_SPRITE_OPAQUE:
1.109 - cx_array_simple_add(scene->rg_sprites_opaque, entry);
1.110 - break;
1.111 - case ASC_RENDER_GROUP_SPRITE_BLEND:
1.112 - cx_array_simple_add(scene->rg_sprites_blended, entry);
1.113 - break;
1.114 - }
1.115 + cxListAdd(render_group[node->render_group], &entry);
1.116 }
1.117 }
1.118
1.119 // set the viewport (in OpenGL we need to invert the Y axis)
1.120 glViewport(
1.121 - scene->viewport.pos.x,
1.122 - -scene->viewport.pos.y,
1.123 - scene->viewport.size.width,
1.124 - scene->viewport.size.height
1.125 + viewport.pos.x,
1.126 + -viewport.pos.y,
1.127 + viewport.size.width,
1.128 + viewport.size.height
1.129 );
1.130 - glClear(GL_COLOR_BUFFER_BIT);
1.131
1.132 - // -----------------------------------------
1.133 - // process the render groups for each camera
1.134 - // -----------------------------------------
1.135 + // -------------------------
1.136 + // process the render groups
1.137 + // -------------------------
1.138 AscShaderProgram *shader;
1.139 - cx_for_n(cam_id, ASC_SCENE_CAMERAS_MAX) {
1.140 - // update camera parameters, first
1.141 - AscCamera *camera = &scene->cameras[cam_id];
1.142 - if (camera->update == NULL) continue;
1.143 - camera->update(camera);
1.144 + CxIterator render_iter;
1.145
1.146 - // 2D Elements
1.147 - // ===========
1.148 - glEnable(GL_DEPTH_TEST);
1.149 - glClear(GL_DEPTH_BUFFER_BIT);
1.150 + // 2D Elements
1.151 + // ===========
1.152 + glEnable(GL_DEPTH_TEST);
1.153 + glClear(GL_DEPTH_BUFFER_BIT);
1.154
1.155 - // Sprites
1.156 - // -------
1.157 - // TODO: see if we can really always ignore the view matrix
1.158 - shader = &asc_context.active_window->glctx.shader.sprite.base;
1.159 - glUseProgram(shader->id);
1.160 - glUniformMatrix4fv(shader->projection, 1,
1.161 - GL_FALSE, camera->projection);
1.162 + // Sprites
1.163 + // -------
1.164 + // TODO: implement view matrix for 2D worlds
1.165 + shader = &asc_context.active_window->glctx.shader.sprite.base;
1.166 + glUseProgram(shader->id);
1.167 + glUniformMatrix4fv(shader->projection, 1,
1.168 + GL_FALSE, camera->projection);
1.169
1.170 - // render opaque sprites from front to back
1.171 - glDisable(GL_BLEND);
1.172 - asc_scene_draw_render_group_reversed(scene->rg_sprites_opaque);
1.173 - // render sprites with alpha value from back to front
1.174 - glEnable(GL_BLEND);
1.175 - glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
1.176 - asc_scene_draw_render_group(scene->rg_sprites_blended);
1.177 + // render opaque sprites from front to back
1.178 + glDisable(GL_BLEND);
1.179 + render_iter = cxListBackwardsIterator(render_group[ASC_RENDER_GROUP_SPRITE_OPAQUE]);
1.180 + asc_draw_render_group(render_iter);
1.181 +
1.182 + // render sprites with alpha value from back to front
1.183 + glEnable(GL_BLEND);
1.184 + glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
1.185 + render_iter = cxListIterator(render_group[ASC_RENDER_GROUP_SPRITE_BLEND]);
1.186 + asc_draw_render_group(render_iter);
1.187 +
1.188 + // destroy render groups
1.189 + cx_for_n(i, ASC_RENDER_GROUP_COUNT) {
1.190 + cxListDestroy(render_group[i]);
1.191 }
1.192 }
1.193
1.194 @@ -213,6 +187,9 @@
1.195 CxTreeIterator iter = asc_scene_node_iterator(node, true);
1.196 cx_foreach(AscSceneNode*, child, iter) {
1.197 if (!iter.exiting) continue;
1.198 + if (child->behaviors != NULL) {
1.199 + cxListDestroy(child->behaviors);
1.200 + }
1.201 if (child->free_func != NULL) {
1.202 child->free_func(child);
1.203 } else {
1.204 @@ -241,28 +218,23 @@
1.205 );
1.206 }
1.207
1.208 -AscBehaviorNode *asc_scene_add_behavior(AscSceneNode *node, asc_scene_update_func behavior) {
1.209 - AscBehaviorNode *behavior_node = calloc(1, sizeof(AscBehaviorNode));
1.210 - behavior_node->func = behavior;
1.211 - cx_tree_link(
1.212 - node,
1.213 - behavior_node,
1.214 - offsetof(AscBehaviorNode, parent),
1.215 - offsetof(AscSceneNode, behaviors),
1.216 - offsetof(AscBehaviorNode, prev),
1.217 - offsetof(AscBehaviorNode, next)
1.218 - );
1.219 - return behavior_node;
1.220 +void asc_scene_add_behavior(
1.221 + AscSceneNode *node,
1.222 + asc_scene_update_func behavior
1.223 +) {
1.224 + if (node->behaviors == NULL) {
1.225 + node->behaviors = cxLinkedListCreateSimple(CX_STORE_POINTERS);
1.226 + }
1.227 + cxListAdd(node->behaviors, behavior);
1.228 }
1.229
1.230 -void asc_scene_remove_behavior(AscBehaviorNode *node) {
1.231 - cx_tree_unlink(
1.232 - node,
1.233 - offsetof(AscBehaviorNode, parent),
1.234 - offsetof(AscSceneNode, behaviors),
1.235 - offsetof(AscBehaviorNode, prev),
1.236 - offsetof(AscBehaviorNode, next)
1.237 - );
1.238 +void asc_scene_remove_behavior(
1.239 + AscSceneNode *node,
1.240 + asc_scene_update_func behavior
1.241 +) {
1.242 + if (node->behaviors != NULL) {
1.243 + cxListFindRemove(node->behaviors, behavior);
1.244 + }
1.245 }
1.246
1.247 void asc_update_transform(AscSceneNode *node) {
