Add simple shadowsHEADmaster

7 files changed, 59 insertions, 2 deletions

diff --git a/include/files.h b/include/files.h
index 8c68d38..ebd57b4 100644
--- a/include/files.h
+++ b/include/files.h
@@ -55,4 +55,12 @@ extern unsigned char *file_model_wireframe_frag_slang_spv_start;
 extern unsigned char *file_model_wireframe_frag_slang_spv_end;
 extern unsigned int   file_model_wireframe_frag_slang_spv_size;
 
+extern unsigned char *file_shadow_vert_slang_spv_start;
+extern unsigned char *file_shadow_vert_slang_spv_end;
+extern unsigned int   file_shadow_vert_slang_spv_size;
+
+extern unsigned char *file_shadow_frag_slang_spv_start;
+extern unsigned char *file_shadow_frag_slang_spv_end;
+extern unsigned int   file_shadow_frag_slang_spv_size;
+
 #endif // TA_FILES_H
\ No newline at end of file
diff --git a/include/model.h b/include/model.h
index 47364ba..56a8c75 100644
--- a/include/model.h
+++ b/include/model.h
@@ -38,6 +38,7 @@ typedef struct ta_model_mesh {
 typedef struct ta_model {
     SDL_GPUGraphicsPipeline *pipeline;
     SDL_GPUGraphicsPipeline *wireframe_pipeline;
+    SDL_GPUGraphicsPipeline *shadow_pipeline;
     SDL_GPUBuffer *vertex_buffer;
     ta_model_mesh mesh;
     Uint32 vertex_count;
@@ -51,6 +52,7 @@ void ta_model_free(ta_model_mesh *mesh);
 bool ta_model_init(ta_model *model, SDL_GPUDevice *device, const float positions[][3], size_t position_count, const unsigned int faces[][TA_MODEL_DIMENSION], size_t face_count, SDL_GPUTextureFormat color_format, SDL_GPUTextureFormat depth_format, SDL_GPUSampleCount sample_count);
 void ta_model_upload(ta_model *model, SDL_GPUCommandBuffer *command_buffer, SDL_GPUDevice *device);
 void ta_model_render(const ta_model *model, SDL_GPUCommandBuffer *command_buffer, SDL_GPURenderPass *render_pass, int window_width, int window_height);
+void ta_model_render_shadow(const ta_model *model, SDL_GPUCommandBuffer *command_buffer, SDL_GPURenderPass *render_pass);
 void ta_model_destroy(ta_model *model, SDL_GPUDevice *device);
 
 #endif // TA_MODEL_H
\ No newline at end of file
diff --git a/include/screen.h b/include/screen.h
index dffbf95..2d61a78 100644
--- a/include/screen.h
+++ b/include/screen.h
@@ -31,5 +31,6 @@ extern ta_screens ta_screen_current;
 void ta_screen_update(void);
 void ta_screen_upload(SDL_GPUCommandBuffer *command_buffer);
 void ta_screen_render(SDL_GPUCommandBuffer *command_buffer, SDL_GPURenderPass *render_pass);
+void ta_screen_render_shadow(SDL_GPUCommandBuffer *command_buffer, SDL_GPURenderPass *render_pass);
 
 #endif // TA_SCREEN_H
\ No newline at end of file
diff --git a/include/screens/main_menu.h b/include/screens/main_menu.h
index a49e8b0..7a449d7 100644
--- a/include/screens/main_menu.h
+++ b/include/screens/main_menu.h
@@ -24,5 +24,6 @@
 void ta_screens_main_menu_update(void);
 void ta_screens_main_menu_upload(SDL_GPUCommandBuffer *command_buffer);
 void ta_screens_main_menu_render(SDL_GPUCommandBuffer *command_buffer, SDL_GPURenderPass *render_pass);
+void ta_screens_main_menu_render_shadow(SDL_GPUCommandBuffer *command_buffer, SDL_GPURenderPass *render_pass);
 
 #endif // TA_SCREENS_MAIN_MENU_H
\ No newline at end of file
diff --git a/include/shadow.h b/include/shadow.h
new file mode 100644
index 0000000..0087ef4
--- /dev/null
+++ b/include/shadow.h
@@ -0,0 +1,41 @@
+/*
+ * Tuxánci 2 - A first person shooter
+ * Copyright (C) 2025-2026  Connor Thomson
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#ifndef TA_SHADOW_H
+#define TA_SHADOW_H
+
+#include "ta_sdl.h"
+
+#define TA_SHADOW_DIMENSION 3
+#define TA_SHADOW_MAP_SIZE  2048u
+#define TA_SHADOW_FORMAT    SDL_GPU_TEXTUREFORMAT_D32_FLOAT
+
+extern SDL_GPUTexture *ta_shadow_texture;
+extern SDL_GPUSampler *ta_shadow_sampler;
+extern float           ta_shadow_light_direction[TA_SHADOW_DIMENSION];
+extern float           ta_shadow_normal_offset;
+extern float           ta_shadow_minimum_bias;
+extern float           ta_shadow_maximum_bias;
+extern float           ta_shadow_strength;
+
+void ta_shadow_init(void);
+void ta_shadow_get_light_view_projection(float *matrix);
+SDL_GPURenderPass *ta_shadow_begin_render_pass(SDL_GPUCommandBuffer *command_buffer);
+void ta_shadow_shutdown(void);
+
+#endif // TA_SHADOW_H
diff --git a/include/ta_math.h b/include/ta_math.h
index 4852fc2..58751ea 100644
--- a/include/ta_math.h
+++ b/include/ta_math.h
@@ -21,9 +21,12 @@
 
 #include <math.h>
 
-#define PI         3.14159265358979323846
-#define CIRCLE_DEG 360.0
+#define PI                 3.14159265358979323846
+#define CIRCLE_DEG         360.0
+#define TA_MATRIX_ELEMENTS 16
 
 double ta_rad(double degrees);
+void ta_matrix_identity(float *matrix);
+void ta_matrix_multiply(float *result, const float *left, const float *right);
 
 #endif // TA_MATH_H
\ No newline at end of file
diff --git a/include/teapot.h b/include/teapot.h
index 99be7a6..a1af76e 100644
--- a/include/teapot.h
+++ b/include/teapot.h
@@ -24,6 +24,7 @@
 void ta_teapot_init(void);
 void ta_teapot_upload(SDL_GPUCommandBuffer *command_buffer);
 void ta_teapot_render(SDL_GPUCommandBuffer *command_buffer, SDL_GPURenderPass *render_pass);
+void ta_teapot_render_shadow(SDL_GPUCommandBuffer *command_buffer, SDL_GPURenderPass *render_pass);
 void ta_teapot_shutdown(void);
 
 #endif // TA_TEAPOT_H
\ No newline at end of file