Basic walking controls (for K+M and controller).

private/sdl_gpu_test/7_3d_scene/app.cpp

@@ -1,9 +1,12 @@
 
 #include "./app.hpp"
 
+#include <numbers>
+
 #include <glm/mat4x4.hpp>
 #include <glm/vec2.hpp>
 #include <glm/vec4.hpp>
+#include <glm/gtx/norm.hpp>
 
 #include "../scene/mesh.hpp"
 #include "../sdlpp/keyboard.hpp"
@@ -14,8 +17,8 @@ namespace sdl_gpu_test
 {
 namespace
 {
-inline constexpr float PITCH_MIN = -89.f;
+inline constexpr float PITCH_MIN = -0.49f * std::numbers::pi_v<float>;
-inline constexpr float PITCH_MAX = 89.f;
+inline constexpr float PITCH_MAX = 0.49f * std::numbers::pi_v<float>;
 inline constexpr Uint16 AXIS_DEADZONE = 5000;
 }
 
@@ -101,8 +104,8 @@ void ThreeDSceneApp::update(const AppUpdateArgs& args)
     mSceneRenderer.render({
         .camera = {
             .position = mPosition,
-            .pitch = glm::radians(mPitch),
+            .pitch = mPitch,
-            .yaw = glm::radians(mYaw)
+            .yaw = mYaw
         },
         .cmdBuffer = &cmdBuffer,
         .targetTexture = &swapchainTexture,
@@ -141,8 +144,8 @@ void ThreeDSceneApp::handleMouseMotionEvent(const sdlpp::MouseMotionEvent& event
 {
     mWidgetTree.notifyMouseMoved(event);
 
-    mYaw -= 0.5f * event.xrel;
+    mYaw -= 0.002f * event.xrel;
-    mPitch -= 0.5f * event.yrel;
+    mPitch -= 0.002f * event.yrel;
 }
 
 void ThreeDSceneApp::handleMouseButtonEvent(const sdlpp::MouseButtonEvent& event)
@@ -152,30 +155,65 @@ void ThreeDSceneApp::handleMouseButtonEvent(const sdlpp::MouseButtonEvent& event
 
 void ThreeDSceneApp::processInput(const AppUpdateArgs& args)
 {
+    glm::vec2 movement = {0.f, 0.f};
+    const std::span<const SDL_bool> keyboardState = sdlpp::getKeyboardState();
     if (mGamepad)
     {
         Sint16 axisValue = mGamepad.getAxis(sdlpp::GamepadAxis::RIGHTX);
         if (std::abs(axisValue) > AXIS_DEADZONE)
         {
-            mYaw -= 0.005f * args.tickSeconds * static_cast<float>(axisValue);
+            mYaw -= 0.0001f * args.tickSeconds * static_cast<float>(axisValue);
         }
 
         axisValue = mGamepad.getAxis(sdlpp::GamepadAxis::RIGHTY);
         if (std::abs(axisValue) > AXIS_DEADZONE)
         {
-            mPitch -= 0.005f * args.tickSeconds * static_cast<float>(axisValue);
+            mPitch -= 0.0001f * args.tickSeconds * static_cast<float>(axisValue);
         }
 
         axisValue = mGamepad.getAxis(sdlpp::GamepadAxis::LEFTY);
         if (std::abs(axisValue) > AXIS_DEADZONE)
         {
-            mPosition.x += 0.0005f * args.tickSeconds * std::sin(mYaw) * static_cast<float>(axisValue);
+            movement.y -= static_cast<float>(axisValue) / static_cast<float>(std::numeric_limits<Sint16>::max());
-            mPosition.z += 0.0005f * args.tickSeconds * std::cos(mYaw) * static_cast<float>(axisValue);
+        }
+
+        axisValue = mGamepad.getAxis(sdlpp::GamepadAxis::LEFTX);
+        if (std::abs(axisValue) > AXIS_DEADZONE)
+        {
+            movement.x += static_cast<float>(axisValue) / static_cast<float>(std::numeric_limits<Sint16>::max());
         }
     }
 
-    while (mYaw >= 360.f) { mYaw -= 360.f; }
+    if (keyboardState[SDL_SCANCODE_W])
-    while (mYaw < 0.f) { mYaw += 360.f; }
+    {
+        movement.y += 1.f;
+    }
+    if (keyboardState[SDL_SCANCODE_S])
+    {
+        movement.y -= 1.f;
+    }
+    if (keyboardState[SDL_SCANCODE_A])
+    {
+        movement.x -= 1.f;
+    }
+    if (keyboardState[SDL_SCANCODE_D])
+    {
+        movement.x += 1.f;
+    }
+
+    if (glm::length2(movement) > 1.f)
+    {
+        movement = glm::normalize(movement);
+    }
+
+    mPosition.x -= 2.f * args.tickSeconds * std::sin(mYaw) * movement.y;
+    mPosition.z -= 2.f * args.tickSeconds * std::cos(mYaw) * movement.y;
+
+    mPosition.x += 2.f * args.tickSeconds * std::cos(mYaw) * movement.x;
+    mPosition.z -= 2.f * args.tickSeconds * std::sin(mYaw) * movement.x;
+
+    while (mYaw >= 2.f * std::numbers::pi) { mYaw -= 2.f * std::numbers::pi_v<float>; }
+    while (mYaw < 0.f) { mYaw += 2.f * std::numbers::pi_v<float>; }
     mPitch = std::clamp(mPitch, PITCH_MIN, PITCH_MAX);
 }
 }

private/sdl_gpu_test/SModule

@@ -30,7 +30,7 @@ src_files = Split("""
 shader_files = env.Glob("#assets/shaders/glsl/*.frag") \
     + env.Glob("#assets/shaders/glsl/*.vert")
 
-env.Append(CPPDEFINES = ['GLM_FORCE_DEPTH_ZERO_TO_ONE', 'GLM_FORCE_RADIANS'])
+env.Append(CPPDEFINES = ['GLM_FORCE_DEPTH_ZERO_TO_ONE', 'GLM_FORCE_RADIANS', 'GLM_ENABLE_EXPERIMENTAL'])
 prog_app = env.UnityProgram(
     target = env['BIN_DIR'] + '/sdl_gpu_test',
     source = src_files,

private/sdl_gpu_test/scene/scene_renderer.cpp

@@ -79,7 +79,7 @@ void SceneRenderer::render(const SceneRendererRenderArgs& args)
     VertexShaderParameters vertexShaderParameters = {
         // note that we are transforming the world, but are passed the camera transform, so invert it
         .worldToView = glm::translate(
-            glm::yawPitchRoll(-args.camera.yaw, -args.camera.pitch, -args.camera.roll),
+            glm::transpose(glm::yawPitchRoll(args.camera.yaw, args.camera.pitch, args.camera.roll)),
             -args.camera.position
         ),
         .viewToClip = glm::perspectiveFov(

private/sdl_gpu_test/scene/transform3d.hpp

@@ -4,13 +4,11 @@
 #if !defined(SDL_GPU_TEST_PRIVATE_SDL_GPU_TEST_SCENE_TRANSFORM3D_HPP_INCLUDED)
 #define SDL_GPU_TEST_PRIVATE_SDL_GPU_TEST_SCENE_TRANSFORM3D_HPP_INCLUDED 1
 
-#define GLM_ENABLE_EXPERIMENTAL 1
 #include <glm/mat4x4.hpp>
 #include <glm/vec3.hpp>
 #include <glm/gtc/matrix_transform.hpp>
 #include <glm/gtx/euler_angles.hpp>
 #include <glm/gtx/matrix_decompose.hpp>
-#undef GLM_ENABLE_EXPERIMENTAL
 
 namespace sdl_gpu_test
 {