ECS POC

2026-04-10 07:31:31 -05:00
parent 42099f7241
commit 0778ffb57a
35 changed files with 187 additions and 794 deletions
@@ -0,0 +1,97 @@
+/**
+ * Copyright (c) 2025 Dominic Masters
+ * 
+ * This software is released under the MIT License.
+ * https://opensource.org/licenses/MIT
+ */
+
+#pragma once
+#include "dusk.h"
+#include "display/color.h"
+#include "display/camera/cameraplatform.h"
+
+#ifndef cameraPushMatrixPlatform
+  #error "cameraPushMatrixPlatform must be defined"
+#endif
+
+
+typedef enum {
+  CAMERA_VIEW_TYPE_MATRIX,
+  CAMERA_VIEW_TYPE_LOOKAT,
+  CAMERA_VIEW_TYPE_2D,
+  CAMERA_VIEW_TYPE_LOOKAT_PIXEL_PERFECT
+} cameraviewtype_t;
+
+typedef struct camera_s {
+  union {
+    mat4 view;
+
+    struct {
+      vec3 position;
+      vec3 target;
+      vec3 up;
+    } lookat;
+
+    struct {
+      vec3 offset;
+      vec3 target;
+      vec3 up;
+      float_t pixelsPerUnit;
+    } lookatPixelPerfect;
+
+    struct {
+      vec2 position;
+      float_t zoom;
+    } _2d;
+  };
+
+  union {
+    struct {
+      float_t fov;
+    } perspective;
+
+    struct {
+      float_t left;
+      float_t right;
+      float_t top;
+      float_t bottom;
+    } orthographic;
+  };
+  
+  float_t nearClip;
+  float_t farClip;
+  
+  cameraprojectiontype_t projType;
+  cameraviewtype_t viewType;
+} camera_t;
+
+/**
+ * Initializes a camera to default values. This calls cameraInitPerspective.
+ */
+void cameraInit(camera_t *camera);
+
+/**
+ * Initializes a camera for perspective projection.
+ */
+void cameraInitPerspective(camera_t *camera);
+
+/**
+ * Initializes a camera for orthographic projection.
+ */
+void cameraInitOrthographic(camera_t *camera);
+
+/**
+ * Gets the projection matrix for a camera.
+ * 
+ * @param camera Camera to get the projection matrix for
+ * @param dest Matrix to store the projection matrix in
+ */
+void cameraGetProjectionMatrix(camera_t *camera, mat4 dest);
+
+/**
+ * Gets the view matrix for a camera.
+ * 
+ * @param camera Camera to get the view matrix for
+ * @param dest Matrix to store the view matrix in
+ */
+void cameraGetViewMatrix(camera_t *camera, mat4 dest);