Initial commit

2021-12-01 03:29:18 +00:00
parent 7fb0a74b7e
commit 3dcaf6df81
72 changed files with 16530 additions and 0 deletions
--- a/source/engine/camera.c
+++ b/source/engine/camera.c
@@ -0,0 +1,137 @@
+#include "camera.h"
+
+#include "gameobject.h"
+#include "input.h"
+#include <SDL.h>
+
+const float CAMERA_MINSPEED = 1.f;
+const float CAMERA_MAXSPEED = 300.f;
+const float CAMERA_ROTATESPEED = 6.f;
+
+void cam_goto_object(struct mCamera *cam, struct mTransform *transform)
+{
+    mfloat_t fwd[3] = { 0.f };
+    vec3_subtract(cam->transform.position, transform->position,
+		  vec3_multiply_f(fwd, trans_forward(fwd, transform),
+				  10.f));
+}
+
+void cam_inverse_goto(struct mCamera *cam, struct mTransform *transform)
+{
+    mfloat_t fwd[3] = { 0.f };
+    vec3_add(transform->position, cam->transform.position,
+	     vec3_multiply_f(fwd, trans_forward(fwd, &cam->transform),
+			     10.f));
+}
+
+mfloat_t *getviewmatrix(mfloat_t view[16],
+			const struct mCamera *const camera)
+{
+    mfloat_t fwd[3] = { 0.f };
+    mfloat_t look[3] = { 0.f };
+    vec3_rotate_quat(fwd, FORWARD, camera->transform.rotation);
+    vec3_add(look, camera->transform.position, fwd);
+    mat4_look_at(view, camera->transform.position, look, UP);
+    return view;
+    /*return mat4_look_at(view, ncam.transform.position,
+       vec3_add(look, ncam.transform.position,
+       trans_forward(fwd, &ncam.transform)),
+       UP); */
+}
+
+void camera_2d_update(struct mCamera *camera, float deltaT)
+{
+    static mfloat_t holdvec[3];
+    static mfloat_t frame[3];
+    vec3_zero(frame);
+
+    if (currentKeystates[SDL_SCANCODE_W])
+	vec3_add(frame, frame, UP);
+    if (currentKeystates[SDL_SCANCODE_S])
+	vec3_add(frame, frame, DOWN);
+    if (currentKeystates[SDL_SCANCODE_A])
+	vec3_add(frame, frame, LEFT);
+    if (currentKeystates[SDL_SCANCODE_D])
+	vec3_add(frame, frame, RIGHT);
+
+    float speedMult = currentKeystates[SDL_SCANCODE_LSHIFT] ? 2.f : 1.f;
+
+    if (!vec3_is_zero(frame)) {
+	vec3_normalize(frame, frame);
+	vec3_add(camera->transform.position, camera->transform.position,
+		 vec3_multiply_f(frame, frame,
+				 camera->speed * speedMult * deltaT));
+    }
+
+}
+
+/*
+void camera_update(struct mCamera * camera, float mouseX, float mouseY,
+		   const uint8_t * keystate, int32_t mouseWheelY,
+		   float deltaTime)
+{
+    //    if (SDL_GetRelativeMouseMode()) vec3_zero(camera->frame_move);
+
+    static mfloat_t holdvec[VEC3_SIZE];
+    vec3_zero(camera->frame_move);
+
+    if (currentKeystates[SDL_SCANCODE_W])
+	vec3_add(camera->frame_move, camera->frame_move,
+		trans_forward(holdvec, &camera->transform));
+
+    if (currentKeystates[SDL_SCANCODE_S])
+	vec3_subtract(camera->frame_move, camera->frame_move,
+		      trans_forward(holdvec, &camera->transform));
+
+    if (currentKeystates[SDL_SCANCODE_A])
+	vec3_subtract(camera->frame_move, camera->frame_move,
+		      trans_right(holdvec, &camera->transform));
+
+    if (currentKeystates[SDL_SCANCODE_D])
+	vec3_add(camera->frame_move, camera->frame_move,
+		 trans_right(holdvec, &camera->transform));
+
+    if (currentKeystates[SDL_SCANCODE_E])
+	vec3_add(camera->frame_move, camera->frame_move,
+		 trans_up(holdvec, &camera->transform));
+
+    if (currentKeystates[SDL_SCANCODE_Q])
+	vec3_subtract(camera->frame_move, camera->frame_move,
+		      trans_up(holdvec, &camera->transform));
+
+    camera->speedMult = currentKeystates[SDL_SCANCODE_LSHIFT] ? 2.f : 1.f;
+
+
+    if (!vec3_is_zero(camera->frame_move)) {
+	vec3_normalize(camera->frame_move, camera->frame_move);
+	vec3_add(camera->transform.position, camera->transform.position,
+		 vec3_multiply_f(camera->frame_move, camera->frame_move,
+				 camera->speed * camera->speedMult *
+				 deltaTime));
+    }
+    // Adjust speed based on mouse wheel
+    camera->speed =
+	clampf(camera->speed + mouseWheelY, CAMERA_MINSPEED,
+	       CAMERA_MAXSPEED);
+
+
+    // TODO: Handle this as additive quaternions
+
+    camera->yaw -= mouseX * CAMERA_ROTATESPEED * deltaTime;
+    camera->pitch -= mouseY * CAMERA_ROTATESPEED * deltaTime;
+
+
+    if (camera->pitch > 89.f)
+	camera->pitch = 89.f;
+    if (camera->pitch < -89.f)
+	camera->pitch = -89.f;
+
+    mfloat_t qyaw[4] = {0.f};
+    mfloat_t qpitch[4] = {0.f};
+
+    quat_from_axis_angle(qyaw, UP, camera->yaw);
+    quat_from_axis_angle(qpitch, RIGHT, camera->pitch);
+    quat_multiply(camera->transform.rotation, qyaw, qpitch);
+
+}
+*/