138 lines
4 KiB
C
138 lines
4 KiB
C
#include "camera.h"
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#include "gameobject.h"
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#include "input.h"
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#include <SDL.h>
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const float CAMERA_MINSPEED = 1.f;
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const float CAMERA_MAXSPEED = 300.f;
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const float CAMERA_ROTATESPEED = 6.f;
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void cam_goto_object(struct mCamera *cam, struct mTransform *transform)
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{
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mfloat_t fwd[3] = { 0.f };
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vec3_subtract(cam->transform.position, transform->position,
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vec3_multiply_f(fwd, trans_forward(fwd, transform),
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10.f));
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}
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void cam_inverse_goto(struct mCamera *cam, struct mTransform *transform)
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{
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mfloat_t fwd[3] = { 0.f };
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vec3_add(transform->position, cam->transform.position,
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vec3_multiply_f(fwd, trans_forward(fwd, &cam->transform),
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10.f));
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}
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mfloat_t *getviewmatrix(mfloat_t view[16],
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const struct mCamera *const camera)
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{
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mfloat_t fwd[3] = { 0.f };
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mfloat_t look[3] = { 0.f };
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vec3_rotate_quat(fwd, FORWARD, camera->transform.rotation);
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vec3_add(look, camera->transform.position, fwd);
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mat4_look_at(view, camera->transform.position, look, UP);
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return view;
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/*return mat4_look_at(view, ncam.transform.position,
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vec3_add(look, ncam.transform.position,
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trans_forward(fwd, &ncam.transform)),
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UP); */
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}
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void camera_2d_update(struct mCamera *camera, float deltaT)
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{
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static mfloat_t holdvec[3];
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static mfloat_t frame[3];
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vec3_zero(frame);
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if (currentKeystates[SDL_SCANCODE_W])
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vec3_add(frame, frame, UP);
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if (currentKeystates[SDL_SCANCODE_S])
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vec3_add(frame, frame, DOWN);
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if (currentKeystates[SDL_SCANCODE_A])
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vec3_add(frame, frame, LEFT);
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if (currentKeystates[SDL_SCANCODE_D])
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vec3_add(frame, frame, RIGHT);
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float speedMult = currentKeystates[SDL_SCANCODE_LSHIFT] ? 2.f : 1.f;
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if (!vec3_is_zero(frame)) {
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vec3_normalize(frame, frame);
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vec3_add(camera->transform.position, camera->transform.position,
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vec3_multiply_f(frame, frame,
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camera->speed * speedMult * deltaT));
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}
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}
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/*
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void camera_update(struct mCamera * camera, float mouseX, float mouseY,
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const uint8_t * keystate, int32_t mouseWheelY,
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float deltaTime)
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{
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// if (SDL_GetRelativeMouseMode()) vec3_zero(camera->frame_move);
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static mfloat_t holdvec[VEC3_SIZE];
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vec3_zero(camera->frame_move);
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if (currentKeystates[SDL_SCANCODE_W])
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vec3_add(camera->frame_move, camera->frame_move,
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trans_forward(holdvec, &camera->transform));
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if (currentKeystates[SDL_SCANCODE_S])
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vec3_subtract(camera->frame_move, camera->frame_move,
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trans_forward(holdvec, &camera->transform));
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if (currentKeystates[SDL_SCANCODE_A])
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vec3_subtract(camera->frame_move, camera->frame_move,
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trans_right(holdvec, &camera->transform));
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if (currentKeystates[SDL_SCANCODE_D])
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vec3_add(camera->frame_move, camera->frame_move,
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trans_right(holdvec, &camera->transform));
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if (currentKeystates[SDL_SCANCODE_E])
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vec3_add(camera->frame_move, camera->frame_move,
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trans_up(holdvec, &camera->transform));
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if (currentKeystates[SDL_SCANCODE_Q])
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vec3_subtract(camera->frame_move, camera->frame_move,
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trans_up(holdvec, &camera->transform));
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camera->speedMult = currentKeystates[SDL_SCANCODE_LSHIFT] ? 2.f : 1.f;
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if (!vec3_is_zero(camera->frame_move)) {
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vec3_normalize(camera->frame_move, camera->frame_move);
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vec3_add(camera->transform.position, camera->transform.position,
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vec3_multiply_f(camera->frame_move, camera->frame_move,
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camera->speed * camera->speedMult *
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deltaTime));
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}
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// Adjust speed based on mouse wheel
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camera->speed =
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clampf(camera->speed + mouseWheelY, CAMERA_MINSPEED,
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CAMERA_MAXSPEED);
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// TODO: Handle this as additive quaternions
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camera->yaw -= mouseX * CAMERA_ROTATESPEED * deltaTime;
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camera->pitch -= mouseY * CAMERA_ROTATESPEED * deltaTime;
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if (camera->pitch > 89.f)
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camera->pitch = 89.f;
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if (camera->pitch < -89.f)
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camera->pitch = -89.f;
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mfloat_t qyaw[4] = {0.f};
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mfloat_t qpitch[4] = {0.f};
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quat_from_axis_angle(qyaw, UP, camera->yaw);
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quat_from_axis_angle(qpitch, RIGHT, camera->pitch);
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quat_multiply(camera->transform.rotation, qyaw, qpitch);
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}
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*/
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