Clean up camera code a bit
This commit is contained in:
parent
359755aad1
commit
4b667e0197
240
src/nol/core.clj
240
src/nol/core.clj
@ -15,18 +15,27 @@
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(def ^LinkedBlockingQueue render-queue (LinkedBlockingQueue.))
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(defonce camera-fly (atom {:type :fly
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:pos (Vector3f.)
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:yaw 0.0
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:pitch 0.0
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:last-x 0.0
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:last-y 0.0
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:target (Vector3f.)
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:view-matrix (.identity (Matrix4f.))}))
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(defonce camera-orbit (atom {:type :orbit
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:pos (Vector3f.)
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:yaw 0.0
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:pitch 0.0
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:last-x 0.0
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:last-y 0.0
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:focus-point (Vector3f.)
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:view-matrix (.identity (Matrix4f.))}))
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(def state (atom {:last-time 0.0
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:drag-start-pos nil
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:camera-pos (Vector3f. 0.0 0.0 10.0)
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:camera-yaw 0.0
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:camera-pitch 0.0
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:orbit-yaw 0.0
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:orbit-pitch 0.0
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:last-orbit-x 0.0
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:last-orbit-y 0.0
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:focus-point (Vector3f.)
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:camera-target (Vector3f.)
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:projection-matrix}))
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:current-mode :static}))
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(defonce gl-thread (atom nil))
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@ -79,8 +88,6 @@
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(defonce uploaded-scene (atom nil))
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(defonce shaders (atom nil))
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(def cam-speed 0.04)
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(defn camera-forward [^double yaw ^double pitch]
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(Vector3f. (* (Math/cos pitch) (Math/sin yaw))
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(Math/sin pitch)
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@ -92,23 +99,24 @@
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(defn camera-up [^Vector3f forward ^Vector3f right]
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(-> (Vector3f. forward) (.cross right)))
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(defn get-ndc [^double x ^double y ^long w ^long h]
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[(- (* 2 (/ x w)) 1)
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(- 1 (* 2 (/ y h)))])
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(defn- key-down? [window key]
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(= (GLFW/glfwGetKey window key) GLFW/GLFW_PRESS))
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(def ^Vector3f move-dir (Vector3f.))
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(def ^Vector3f focus-distance 5.0)
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(defn- handle-key-actions! [_win key _scancode action _mods]
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(when (= action GLFW/GLFW_PRESS)
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(when (= key GLFW/GLFW_KEY_ESCAPE)
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(swap! state assoc :should-close true))
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(when (= key GLFW/GLFW_KEY_R)
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(swap! state assoc
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:camera-pos (Vector3f. 0.0 0.0 10.0)
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:camera-yaw 0.0
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:camera-pitch 0.0
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:focus-point (Vector3f. 0.0 0.0 0.0)
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:camera-target (Vector3f.)))))
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(swap! state update :current-camera
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#(merge % {:pos (Vector3f. 0.0 0.0 10.0)
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:yaw 0.0
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:pitch 0.0
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:focus-point (Vector3f. 0.0 0.0 0.0)
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:target (Vector3f.)})))))
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(defn- drag-detected? [^double x1 ^double y1 ^double x2 ^double y2]
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(let [threshold 10.0
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@ -116,63 +124,73 @@
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dy (- y2 y1)]
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(< threshold (+ (* dx dx) (* dy dy)))))
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(def cam-speed 0.04)
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(defn- handle-keyboard-state! [window]
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(let [{:keys [camera-yaw camera-pitch ^Vector3f camera-pos]} @state]
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(when (key-down? window GLFW/GLFW_KEY_W)
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(.add move-dir 0.0 0.0 1.0))
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(when (key-down? window GLFW/GLFW_KEY_S)
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(.add move-dir 0.0 0.0 -1.0))
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(when (key-down? window GLFW/GLFW_KEY_A)
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(.add move-dir -1.0 0.0 0.0))
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(when (key-down? window GLFW/GLFW_KEY_D)
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(.add move-dir 1.0 0.0 0.0))
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(when (key-down? window GLFW/GLFW_KEY_Q)
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(.add move-dir 0.0 1.0 0.0))
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(when (key-down? window GLFW/GLFW_KEY_E)
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(.add move-dir 0.0 -1.0 0.0))
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(when (> (.length move-dir) 0.0)
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(.normalize move-dir)
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(let [forward ^Vector3f (camera-forward camera-yaw camera-pitch)
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right ^Vector3f (camera-right camera-yaw)
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up ^Vector3f (camera-up forward right)
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velocity ^Vector3f (-> (Vector3f. right)
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(.mul (.x move-dir))
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(.fma (.z move-dir) forward)
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(.fma (.y move-dir) up)
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(.mul ^double cam-speed))]
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(.add camera-pos velocity)))
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(.set move-dir 0.0 0.0 0.0)))
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(when-let [camera (when (= (:current-mode @state) :fly)
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@camera-fly)]
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(let [move-dir (Vector3f.)
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{:keys [yaw pitch ^Vector3f pos]} camera]
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(when (key-down? window GLFW/GLFW_KEY_W)
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(.add move-dir 0.0 0.0 1.0))
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(when (key-down? window GLFW/GLFW_KEY_S)
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(.add move-dir 0.0 0.0 -1.0))
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(when (key-down? window GLFW/GLFW_KEY_A)
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(.add move-dir -1.0 0.0 0.0))
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(when (key-down? window GLFW/GLFW_KEY_D)
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(.add move-dir 1.0 0.0 0.0))
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(when (key-down? window GLFW/GLFW_KEY_Q)
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(.add move-dir 0.0 1.0 0.0))
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(when (key-down? window GLFW/GLFW_KEY_E)
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(.add move-dir 0.0 -1.0 0.0))
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(when (> (.length move-dir) 0.0)
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(.normalize move-dir)
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(let [forward ^Vector3f (camera-forward yaw pitch)
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right ^Vector3f (camera-right yaw)
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up ^Vector3f (camera-up forward right)
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velocity ^Vector3f (-> (Vector3f. right)
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(.mul (.x move-dir))
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(.fma (.z move-dir) forward)
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(.fma (.y move-dir) up)
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(.mul ^double cam-speed))]
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(.add pos velocity)))
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(.set move-dir 0.0 0.0 0.0))))
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(defn- handle-mouse-move! [_window ^double xpos ^double ypos]
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(when (:orbit-mode @state)
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(let [{:keys [^double orbit-yaw ^double orbit-pitch]} @state
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last-orbit-x (double (or (:last-orbit-x @state) xpos))
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last-orbit-y (double (or (:last-orbit-y @state) ypos))
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sensitivity 0.005
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dx (- last-orbit-x xpos)
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dy (- last-orbit-y ypos)]
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(swap! state assoc
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:last-orbit-x xpos
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:last-orbit-y ypos
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:orbit-yaw (- orbit-yaw (* dx sensitivity))
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:orbit-pitch (-> (- orbit-pitch (* dy sensitivity))
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(max (- (/ Math/PI 2)))
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(min (/ Math/PI 2))))))
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#_(when-let [cursor-pos ^Vector2f (:drag-start-pos @state)]
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(when (and (drag-detected? xpos ypos (.x cursor-pos) (.y cursor-pos)))
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(swap! state assoc :orbit-mode true)))
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(when (:fps-mode @state)
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(let [{:keys [^double camera-yaw ^double camera-pitch]} @state
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last-cursor-x (double (or (:last-cursor-x @state) xpos))
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last-cursor-y (double (or (:last-cursor-y @state) ypos))
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sensitivity 0.001
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dx (- last-cursor-x xpos)
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dy (- last-cursor-y ypos)]
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(swap! state assoc
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:last-cursor-x xpos
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:last-cursor-y ypos
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:camera-yaw (- camera-yaw (* dx sensitivity))
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:camera-pitch (+ camera-pitch (* dy sensitivity))))))
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(when-let [camera (case (:current-mode @state)
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:fly camera-fly
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:orbit camera-orbit
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:static nil)]
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(when (and (= (:type @camera) :orbit))
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(let [{:keys [^double yaw ^double pitch last-x last-y]} @camera
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last-x (double (or last-x xpos))
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last-y (double (or last-y ypos))
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sensitivity 0.005
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dx (- last-x xpos)
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dy (- last-y ypos)
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fwd ^Vector3f (camera-forward yaw pitch)]
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(swap! camera assoc
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:last-x xpos
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:last-y ypos
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:yaw (- yaw (* dx sensitivity))
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:pitch (-> (- pitch (* dy sensitivity))
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(max (- (/ Math/PI 2)))
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(min (/ Math/PI 2))))))
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#_(when-let [cursor-pos ^Vector2f (:drag-start-pos @state)]
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(when (and (drag-detected? xpos ypos (.x cursor-pos) (.y cursor-pos)))
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(swap! state assoc :orbit-mode true)))
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(when (and (= (:type @camera) :fly))
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(let [{:keys [^double yaw ^double pitch pos last-x last-y]} @camera
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last-x (double (or last-x xpos))
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last-y (double (or last-y ypos))
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sensitivity 0.001
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dx (- last-x xpos)
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dy (- last-y ypos)]
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(swap! camera assoc
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:last-x xpos
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:last-y ypos
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:yaw (- yaw (* dx sensitivity))
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:pitch (+ pitch (* dy sensitivity)))))))
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(defn- get-current-cursor-pos! ^Vector2f [^MemoryStack stack ^long window]
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(let [xbuf (.mallocDouble stack 1)
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@ -184,23 +202,24 @@
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(cond
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(and (= button GLFW/GLFW_MOUSE_BUTTON_RIGHT) (= action GLFW/GLFW_PRESS))
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(let []
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(swap! state assoc :fps-mode true)
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(swap! state assoc :current-mode :fly)
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(GLFW/glfwSetInputMode win GLFW/GLFW_CURSOR GLFW/GLFW_CURSOR_DISABLED))
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(and (= button GLFW/GLFW_MOUSE_BUTTON_RIGHT) (= action GLFW/GLFW_RELEASE))
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(let []
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(swap! state assoc :fps-mode false :last-cursor-x nil :last-cursor-y nil)
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(swap! state assoc :current-mode :static)
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(swap! camera-fly assoc :last-x nil :last-y nil)
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(GLFW/glfwSetInputMode win GLFW/GLFW_CURSOR GLFW/GLFW_CURSOR_NORMAL))
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(and (= button GLFW/GLFW_MOUSE_BUTTON_LEFT) (= action GLFW/GLFW_PRESS))
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(do
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(when (mods :ctrl)
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(swap! state assoc :orbit-mode true))
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(swap! state assoc :current-mode :orbit))
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(swap! state assoc :drag-start-pos (get-current-cursor-pos! (MemoryStack/stackGet) win)))
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(and (= button GLFW/GLFW_MOUSE_BUTTON_LEFT) (= action GLFW/GLFW_RELEASE))
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(let []
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(swap! state assoc :orbit-mode false :drag-start-pos nil :last-orbit-x nil :last-orbit-y nil)
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(swap! state assoc :current-mode :static :drag-start-pos nil)
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(GLFW/glfwSetCursor win MemoryUtil/NULL))))
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(defn render-scene [^MemoryStack stack scene node ^Matrix4f mtx]
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@ -229,6 +248,13 @@
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(doseq [child children]
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(render-scene stack scene child model-mtx)))))
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(defn- camera-view-matrix [{:keys [yaw pitch ^Vector3f pos ^Vector3f target ^Matrix4f view-matrix]}]
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(-> view-matrix
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(.identity)
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(.lookAt (.x pos) (.y pos) (.z pos)
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(.x target) (.y target) (.z target)
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0.0 1.0 0.0)))
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(defn- update-loop [window ^MemoryStack stack data]
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(let [w-buf (.mallocInt stack 1)
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h-buf (.mallocInt stack 1)
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@ -248,34 +274,13 @@
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(GL20/glUseProgram program)
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(let [vbuf (.mallocFloat stack 16)
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pbuf (.mallocFloat stack 16)
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radius 10.0
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{:keys [^double camera-yaw ^double camera-pitch ^Vector3f camera-pos camera-target]} @state
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fwd ^Vector3f (camera-forward camera-yaw camera-pitch)
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camera-pos (if (:orbit-mode @state)
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(let [fwd ^Vector3f (camera-forward (:orbit-yaw @state) (:orbit-pitch @state))
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orbit-pos (Vector3f. ^Vector3f (:focus-point @state))]
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(.add orbit-pos (.mul (Vector3f. fwd) 8.0)))
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camera-pos)
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target (:camera-target @state)
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_ (doto ^Vector3f target
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(.set camera-pos)
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(.add fwd))
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target (if (:orbit-mode @state)
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(:focus-point @state)
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target)
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view (-> (Matrix4f.)
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(.identity)
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(.lookAt (.x camera-pos) (.y camera-pos) (.z camera-pos) ;; eye (camera position)
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(.x ^Vector3f target) (.y ^Vector3f target) (.z ^Vector3f target) ;; center (where to look)
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0.0 1.0 0.0)) ;; up
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proj (-> (Matrix4f.)
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(.identity)
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(.perspective (float (Math/toRadians 45))
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(float (/ (float w) (float h)))
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(float 0.1)
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(float 100.0)))]
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(.get view vbuf)
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(.get proj pbuf)
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camera (if (= :orbit (:current-mode @state))
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camera-orbit
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camera-fly)
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view (camera-view-matrix @camera)
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proj (:projection-matrix @state)]
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(.get ^Matrix4f view vbuf)
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(.get ^Matrix4f proj pbuf)
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(GL20/glUniformMatrix4fv ^int (:mv uniforms) false vbuf)
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(GL20/glUniformMatrix4fv ^int (:mp uniforms) false pbuf)
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(render-scene stack scene (:hiearchy scene) (Matrix4f.)))))
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@ -299,6 +304,18 @@
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(reset! shaders nil)
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(swap! state assoc :should-close true))
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(defn- init [window width height]
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(swap! state assoc
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:window window
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:should-close false
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:projection-matrix
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(-> (Matrix4f.)
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(.identity)
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(.perspective (float (Math/toRadians 45))
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(float (/ (float width) (float height)))
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(float 0.1)
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(float 100.0)))))
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(defn -main []
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(when-not (GLFW/glfwInit)
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(throw (RuntimeException. "Failed to init GLFW")))
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@ -307,7 +324,9 @@
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(GLFW/glfwWindowHint GLFW/GLFW_CONTEXT_VERSION_MINOR 5)
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(GLFW/glfwWindowHint GLFW/GLFW_OPENGL_PROFILE GLFW/GLFW_OPENGL_CORE_PROFILE)
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(let [window (GLFW/glfwCreateWindow 960 500 #_#_1900 1100 "NOL" MemoryUtil/NULL MemoryUtil/NULL)]
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(let [width 960 #_1900
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height 500 #_1100
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window (GLFW/glfwCreateWindow 960 500 "NOL" MemoryUtil/NULL MemoryUtil/NULL)]
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(when (= window MemoryUtil/NULL)
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(GLFW/glfwTerminate)
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(throw (RuntimeException. "Failed to create window")))
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@ -320,8 +339,6 @@
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(GL11/glCullFace GL11/GL_BACK)
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(GLFW/glfwSwapInterval 1)
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(swap! state assoc :window window :should-close false)
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(GLFW/glfwSetKeyCallback window
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(reify GLFWKeyCallbackI
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(invoke [_ win key scancode action mods]
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@ -350,6 +367,7 @@
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(handle-mouse-buttons! win button action mods))
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(catch Exception e
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(println "Mouse Button Callback Exception:" e))))))
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(init window width height)
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(loop []
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(loop []
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(when-let [f (.poll render-queue)]
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@ -515,6 +533,8 @@
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(reset! uploaded-scene (with-gl (upload-scene! @loaded-scene)))
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(reset! shaders (with-gl (load-shaders! "shaders/base.vert" "shaders/base.frag")))
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(swap! state assoc :current-state :static)
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(with-gl
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(GL11/glClearColor 0.392 0.584 0.929 1.0))
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(with-gl
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