wip: porting shadowmaps to RAL

1 files changed, 81 insertions, 0 deletions

diff --git a/examples/shadow_maps/ex_shadow_maps.c b/examples/shadow_maps/ex_shadow_maps.c
index e69de29..1d40128 100644
--- a/examples/shadow_maps/ex_shadow_maps.c
+++ b/examples/shadow_maps/ex_shadow_maps.c
@@ -0,0 +1,81 @@
+#include "celeritas.h"
+#include "maths_types.h"
+#include "primitives.h"
+#include "ral.h"
+#include "render.h"
+#include "render_types.h"
+#include "renderpasses.h"
+
+extern core g_core;
+
+// Scene / light setup
+const vec3 pointlight_positions[4] = {
+  { -10.0, 10.0, 10.0 },
+  { 10.0, 10.0, 10.0 },
+  { -10.0, -10.0, 10.0 },
+  { 10.0, -10.0, 10.0 },
+};
+point_light point_lights[4];
+
+int main() {
+  core_bringup();
+  arena scratch = arena_create(malloc(1024 * 1024), 1024 * 1024);
+
+  vec3 camera_pos = vec3(2., 2., 2.);
+  vec3 camera_front = vec3_normalise(vec3_negate(camera_pos));
+  camera cam = camera_create(camera_pos, camera_front, VEC3_Y, deg_to_rad(45.0));
+
+  ren_shadowmaps shadows = { .width = 1000, .height = 1000 };
+  ren_shadowmaps_init(&shadows);
+
+  // Meshes
+  mesh cubes[4];
+  for (int i = 0; i < 4; i++) {
+    geometry_data geo = geo_create_cuboid(f32x3(2,2,2));
+    cubes[i] = mesh_create(&geo, true);
+  }
+
+  // Main loop
+  while (!should_exit(&g_core)) {
+    input_update(&g_core.input);
+
+    if (!gpu_backend_begin_frame()) {
+      continue;
+    }
+    gpu_cmd_encoder* enc = gpu_get_default_cmd_encoder();
+
+    gpu_cmd_encoder_begin_render(enc, shadows.rpass);
+    encode_bind_pipeline(enc, PIPELINE_GRAPHICS, shadows.static_pipeline);
+    for (int i = 0; i < 4; i++) {
+      encode_set_vertex_buffer(enc, cubes[i].vertex_buffer);
+      encode_set_index_buffer(enc, cubes[i].index_buffer);
+      encode_draw_indexed(enc, cubes[i].geometry->indices->len);
+    }
+
+    gpu_cmd_encoder_end_render(enc);
+
+    gpu_cmd_encoder_begin_render(enc, static_opaque_rpass);
+
+    gpu_cmd_encoder_end_render(enc);
+    /*
+    Shadows
+
+    render scene into texture
+
+    begin_renderpass()
+    bind_pipeline()
+    upload shader data
+    for each object:
+      - set buffers
+      - draw call
+
+    end_renderpass()
+    */
+    
+    gpu_backend_end_frame();
+  }
+
+  renderer_shutdown(&g_core.renderer);
+
+  return 0;
+}