star-3d

commit d9e8cabe258130741b8f2103b3efcaf495e579d7
parent d80f604129e3d8a1daa6f464edd63d9084428103
Author: Vincent Forest <vincent.forest@meso-star.com>
Date:   Wed, 11 Mar 2015 09:38:01 +0100

Begin the implementation of the scene back-end

Diffstat:
M
src/s3d_scene.c
 | 
36
++++++++++++++++++++++++++++++++++++
M
src/s3d_shape_c.h
 | 
2
+-

2 files changed, 37 insertions(+), 1 deletion(-)
diff --git a/src/s3d_scene.c b/src/s3d_scene.c
@@ -34,11 +34,13 @@
 #include "s3d_device_c.h"
 #include "s3d_shape_c.h"
 
+#include <embree2/rtcore.h>
 #include <rsys/mem_allocator.h>
 
 struct s3d_scene {
   struct list_node shapes; /* List of attached shapes */
   struct s3d_device* dev;
+  RTCScene rtc_scn;
   ref_T ref;
 };
 
@@ -46,6 +48,31 @@ struct s3d_scene {
  * Helper functions
  ******************************************************************************/
 static void
+scene_setup(struct s3d_scene* scn)
+{
+  struct list_node* node;
+
+  LIST_FOR_EACH(node, &scn->shapes) {
+    struct s3d_shape* shape = CONTAINER_OF
+      (node, struct s3d_shape, scene_attachment);
+    uint32_t* ids = darray_u32_data_get(&shape->indices);
+    float* pos = darray_float_data_get(&shape->positions);
+    const size_t ntris = darray_u32_size_get(&shape->indices) / 3;
+    const size_t nverts = darray_float_size_get(&shape->positions) / 3;
+    ASSERT(IS_ALIGNED(ids, 16));
+
+    ASSERT(shape->type == SHAPE_TRIMESH);
+    shape->rtc_geom = rtcNewTriangleMesh
+      (scn->rtc_scn, RTC_GEOMETRY_STATIC, ntris, nverts);
+    rtcSetBuffer(scn->rtc_scn, shape->rtc_geom, RTC_INDEX_BUFFER, ids, 0,
+      sizeof(uint32_t[3]));
+    rtcSetBuffer(scn->rtc_scn, shape->rtc_geom, RTC_VERTEX_BUFFER, pos, 0,
+      sizeof(float[3]));
+  }
+  rtcCommit(scn->rtc_scn);
+}
+
+static void
 scene_release(ref_T* ref)
 {
   struct s3d_scene* scn;
@@ -54,6 +81,8 @@ scene_release(ref_T* ref)
   scn = CONTAINER_OF(ref, struct s3d_scene, ref);
   S3D(scene_clear(scn));
   dev = scn->dev;
+  if(scn->rtc_scn)
+    rtcDeleteScene(scn->rtc_scn);
   MEM_FREE(dev->allocator, scn);
   S3D(device_ref_put(dev));
 }
@@ -81,6 +110,13 @@ s3d_scene_create(struct s3d_device* dev, struct s3d_scene** out_scn)
   ref_init(&scn->ref);
   S3D(device_ref_get(dev));
   scn->dev = dev;
+  scn->rtc_scn = rtcNewScene
+    (RTC_SCENE_STATIC | RTC_SCENE_INCOHERENT,
+     RTC_INTERSECT1 | RTC_INTERSECT4);
+  if(!scn->rtc_scn) {
+    res = RES_MEM_ERR;
+    goto error;
+  }
 
 exit:
   if(out_scn) *out_scn = scn;
diff --git a/src/s3d_shape_c.h b/src/s3d_shape_c.h
@@ -48,7 +48,7 @@ enum shape_type {
 struct s3d_shape {
   struct list_node scene_attachment;
   enum shape_type type;
-  unsigned igeom; /* Embree geometry id */
+  unsigned rtc_geom; /* Embree geometry id */
 
   darray_u32 indices;
   darray_float positions; /* list of 3 floats */