wip: debug quad shader

1 files changed, 54 insertions, 29 deletions

diff --git a/examples/shadow_maps/ex_shadow_maps.c b/examples/shadow_maps/ex_shadow_maps.c
index 3b647ee..30df618 100644
--- a/examples/shadow_maps/ex_shadow_maps.c
+++ b/examples/shadow_maps/ex_shadow_maps.c
@@ -1,7 +1,9 @@
 #include "celeritas.h"
+#include "maths.h"
 #include "maths_types.h"
 #include "primitives.h"
 #include "ral.h"
+#include "ral_types.h"
 #include "render.h"
 #include "render_types.h"
 #include "renderpasses.h"
@@ -9,19 +11,17 @@
 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];
+vec3 light_position = { -2, 4, -1 };
+mesh s_scene[5];
+transform s_transforms[5];
 
 /*
   TODO:
 - keyboard button to switch between main camera and light camera
 */
 
+void draw_scene();
+
 int main() {
   core_bringup();
   arena scratch = arena_create(malloc(1024 * 1024), 1024 * 1024);
@@ -31,19 +31,27 @@ int main() {
   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);
+  ren_shadowmaps_init(&shadows);
 
   // Set up the scene
   // We want:
   // 1. a ground plane
   // 2. lights
   // 3. some boxes
-
-  mesh scene[5];
   for (int i = 0; i < 4; i++) {
     geometry_data geo = geo_create_cuboid(f32x3(2, 2, 2));
-    cubes[i] = mesh_create(&geo, true);
+    s_scene[i] = mesh_create(&geo, true);
+    s_transforms[i] = transform_create(vec3(4 * i, 0, 0), quat_ident(), 1.0);
   }
+  geometry_data plane = geo_create_plane(f32x2(20, 20));
+  s_scene[4] = mesh_create(&plane, true);
+
+  geometry_data quad_geo = geo_create_plane(f32x2(2,2));
+  mesh quad = mesh_create(&quad_geo, true);
+
+  shader_data model_data = { .data = NULL, .shader_data_get_layout = &model_uniform_layout };
+  shader_data lightspace_data = { .data = NULL,
+                                  .shader_data_get_layout = &lightspace_uniform_layout };
 
   // Main loop
   while (!should_exit(&g_core)) {
@@ -55,32 +63,37 @@ int main() {
     gpu_cmd_encoder* enc = gpu_get_default_cmd_encoder();
 
     gpu_cmd_encoder_begin_render(enc, shadows.rpass);
+
+    // calculations
+    f32 near_plane = 1.0, far_plane = 7.5;
+    mat4 light_projection = mat4_orthographic(-10.0, 10.0, -10.0, 10.0, near_plane, far_plane);
+    mat4 light_view = mat4_look_at(light_position, VEC3_ZERO, VEC3_Y);
+    mat4 light_space_matrix = mat4_mult(light_view, light_projection);
+    lightspace_tf_uniform lsu = { .lightSpaceMatrix = light_space_matrix };
+
     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);
+    lightspace_data.data = &lsu;
+    encode_bind_shader_data(enc, 0, &lightspace_data);
 
-    // gpu_cmd_encoder_begin_render(enc, static_opaque_rpass);
+    draw_scene();
 
     gpu_cmd_encoder_end_render(enc);
-    /*
-    Shadows
 
-    render scene into texture
+    gpu_cmd_encoder_begin_render(enc, shadows.debug_quad->renderpass);
+    encode_bind_pipeline(enc, PIPELINE_GRAPHICS, shadows.debug_quad);
+    debug_quad_uniform dqu = {.depthMap = shadows.depth_tex};
+    shader_data debug_quad_data = { .data = &dqu, .shader_data_get_layout = debug_quad_layout};
+    encode_bind_shader_data(enc, 0, &debug_quad_data);
+    encode_set_vertex_buffer(enc, quad.vertex_buffer);
+    encode_set_index_buffer(enc, quad.index_buffer);
+    encode_draw_indexed(enc, quad.geometry->indices->len);
+
+    gpu_cmd_encoder_end_render(enc);
 
-    begin_renderpass()
-    bind_pipeline()
-    upload shader data
-    for each object:
-      - set buffers
-      - draw call
+    // gpu_cmd_encoder_begin_render(enc, static_opaque_rpass);
 
-    end_renderpass()
-    */
+    // gpu_cmd_encoder_end_render(enc);
 
     gpu_backend_end_frame();
   }
@@ -89,3 +102,15 @@ int main() {
 
   return 0;
 }
+
+void draw_scene() {
+  gpu_cmd_encoder* enc = gpu_get_default_cmd_encoder();
+  for (int i = 0; i < 5; i++) {
+    model_uniform mu = { .model = transform_to_mat(&s_transforms[i]) };
+    shader_data model_data = { .data = &mu, .shader_data_get_layout = model_uniform_layout };
+    encode_bind_shader_data(enc, 0, &model_data);
+    encode_set_vertex_buffer(enc, s_scene[i].vertex_buffer);
+    encode_set_index_buffer(enc, s_scene[i].index_buffer);
+    encode_draw_indexed(enc, s_scene[i].geometry->indices->len);
+  }
+}