Integer camera

4 files changed, 36 insertions, 36 deletions

diff --git a/gfx/gl/camera.cpp b/gfx/gl/camera.cpp
index 15f76c4..a0d76ab 100644
--- a/gfx/gl/camera.cpp
+++ b/gfx/gl/camera.cpp
@@ -1,14 +1,14 @@
 #include "camera.h"
 #include <collections.h>
-#include <glm/gtx/intersect.hpp> // IWYU pragma: keep
-#include <glm/gtx/transform.hpp> // IWYU pragma: keep
-#include <math.h>
+#include <glm/gtx/transform.hpp>
 #include <maths.h>
 #include <ray.h>
 
-Camera::Camera(Position3D pos, Angle fov, Angle aspect, Distance zNear, Distance zFar) :
+Camera::Camera(GlobalPosition3D pos, Angle fov, Angle aspect, GlobalDistance zNear, GlobalDistance zFar) :
 	position {pos}, forward {::north}, up {::up}, near {zNear}, far {zFar},
-	projection {glm::perspective(fov, aspect, zNear, zFar)}, viewProjection {}, inverseViewProjection {}
+	projection {
+			glm::perspective(fov, aspect, static_cast<RelativeDistance>(zNear), static_cast<RelativeDistance>(zFar))},
+	viewProjection {}, inverseViewProjection {}
 {
 	updateView();
 }
@@ -25,7 +25,7 @@ void
 Camera::updateView()
 {
 	viewProjection = projection * glm::lookAt(origin, forward, up);
-	inverseViewProjection = glm::inverse(projection * glm::lookAt(position, position + forward, up));
+	inverseViewProjection = glm::inverse(viewProjection);
 }
 
 Direction3D
@@ -35,21 +35,21 @@ Camera::upFromForward(const Direction3D & forward)
 	return glm::cross(forward, right);
 }
 
-std::array<glm::vec4, 4>
-Camera::extentsAtDist(const float dist) const
+std::array<GlobalPosition4D, 4>
+Camera::extentsAtDist(const GlobalDistance dist) const
 {
-	const auto clampToSeaFloor = [this, dist](const Position3D & target) {
-		if (target.z < -1.5F) {
-			const auto vec = glm::normalize(target - position);
-			constexpr Position3D seafloor {0, 0, -1.5F};
-			float outdist {};
-			if (glm::intersectRayPlane(position, vec, seafloor, ::up, outdist)) {
-				return (vec * outdist + position) ^ outdist;
-			}
+	const auto clampToSeaFloor = [this, dist](GlobalPosition3D target) -> GlobalPosition4D {
+		target += position;
+		if (target.z < -1500) {
+			const auto diff = (target - position);
+			const auto something = (-1500 - position.z) / diff.z;
+			return {position + diff * something, dist};
 		}
-		return target ^ dist;
+		return {target, dist};
 	};
-	const auto depth = -(2.F * (dist - near) * far) / (dist * (near - far)) - 1.F;
+	const auto depth = -(2.F * (static_cast<float>(dist - near)) * static_cast<float>(far))
+					/ (static_cast<float>(dist) * (static_cast<float>(near - far)))
+			- 1.F;
 	static constexpr const std::array extents {-1.F, 1.F};
 	static constexpr const auto cartesianExtents = extents * extents;
 	return cartesianExtents * [&depth, this, &clampToSeaFloor](const auto & extent) {
diff --git a/gfx/gl/camera.h b/gfx/gl/camera.h
index 469df0d..eca7b8f 100644
--- a/gfx/gl/camera.h
+++ b/gfx/gl/camera.h
@@ -7,7 +7,7 @@
 
 class Camera {
 public:
-	Camera(Position3D, Angle fov, Angle aspect, Distance zNear, Distance zFar);
+	Camera(GlobalPosition3D, Angle fov, Angle aspect, GlobalDistance zNear, GlobalDistance zFar);
 
 	[[nodiscard]] glm::mat4
 	getViewProjection() const
@@ -18,7 +18,7 @@ public:
 	[[nodiscard]] Ray unProject(const ScreenRelCoord &) const;
 
 	void
-	setPosition(const Position3D & p)
+	setPosition(const GlobalPosition3D & p)
 	{
 		position = p;
 		updateView();
@@ -39,23 +39,23 @@ public:
 	}
 
 	void
-	setView(const Position3D & p, const Direction3D & f)
+	setView(const GlobalPosition3D & p, const Direction3D & f)
 	{
 		position = p;
 		setForward(f);
 	}
 
 	void
-	setView(const Position3D & p, const Direction3D & f, const Direction3D & u)
+	setView(const GlobalPosition3D & p, const Direction3D & f, const Direction3D & u)
 	{
 		position = p;
 		setView(f, u);
 	}
 
 	void
-	lookAt(const Position3D & target)
+	lookAt(const GlobalPosition3D & target)
 	{
-		setForward(glm::normalize(target - position));
+		setForward(glm::normalize(RelativePosition3D(target - position)));
 	}
 
 	[[nodiscard]] auto
@@ -70,18 +70,18 @@ public:
 		return position;
 	}
 
-	[[nodiscard]] std::array<glm::vec4, 4> extentsAtDist(float) const;
+	[[nodiscard]] std::array<GlobalPosition4D, 4> extentsAtDist(GlobalDistance) const;
 
 	[[nodiscard]] static Direction3D upFromForward(const Direction3D & forward);
 
 private:
 	void updateView();
 
-	Position3D position;
+	GlobalPosition3D position;
 	Direction3D forward;
 	Direction3D up;
 
-	float near, far;
+	GlobalDistance near, far;
 	glm::mat4 projection;
 	glm::mat4 viewProjection, inverseViewProjection;
 };
diff --git a/gfx/gl/sceneRenderer.cpp b/gfx/gl/sceneRenderer.cpp
index 53178e5..582c28c 100644
--- a/gfx/gl/sceneRenderer.cpp
+++ b/gfx/gl/sceneRenderer.cpp
@@ -15,7 +15,7 @@ static constexpr const std::array<const glm::i8vec4, 4> displayVAOdata {{
 }};
 
 SceneRenderer::SceneRenderer(ScreenAbsCoord s, GLuint o) :
-	camera {{-1250000.0F, -1250000.0F, 35.0F}, quarter_pi, ratio(s), 100.F, 10000000.0F}, size {s}, output {o},
+	camera {{-1250000, -1250000, 35.0F}, quarter_pi, ratio(s), 100, 10000000}, size {s}, output {o},
 	lighting {lighting_vs, lighting_fs}, shadowMapper {{2048, 2048}}
 {
 	shader.setViewPort({0, 0, size.x, size.y});
diff --git a/gfx/gl/shadowMapper.cpp b/gfx/gl/shadowMapper.cpp
index 66905df..deb0630 100644
--- a/gfx/gl/shadowMapper.cpp
+++ b/gfx/gl/shadowMapper.cpp
@@ -79,12 +79,12 @@ constexpr std::array<std::array<TextureRelRegion, ShadowMapper::SHADOW_BANDS>, S
 						{0.25F, 0.25F, 0.75F, 0.75F}, // upper right
 				}},
 		}};
-constexpr std::array<float, ShadowMapper::SHADOW_BANDS + 1> shadowBands {
-		1000.F,
-		250000.F,
-		750000.F,
-		2500000.F,
-		10000000.F,
+constexpr std::array<GlobalDistance, ShadowMapper::SHADOW_BANDS + 1> shadowBands {
+		1000,
+		250000,
+		750000,
+		2500000,
+		10000000,
 };
 static_assert(viewports.size() == shadowMapRegions.size());
 static_assert(shadowBands.size() == shadowMapRegions.size() + 1);
@@ -114,7 +114,7 @@ ShadowMapper::getBandViewExtents(const Camera & camera, const glm::mat4 & lightV
 		bandViewExtents.emplace_back(extents * [&lightView](const auto & e) -> Position3D {
 			return lightView * glm::vec4(Position3D {e}, 1);
 		});
-		if (std::none_of(extents.begin(), extents.end(), [targetDist = dist * 0.99F](const glm::vec4 & e) {
+		if (std::none_of(extents.begin(), extents.end(), [targetDist = dist - 1](const auto & e) {
 				return e.w > targetDist;
 			})) {
 			break;
@@ -130,8 +130,8 @@ ShadowMapper::update(const SceneProvider & scene, const Direction3D & dir, const
 	glClear(GL_DEPTH_BUFFER_BIT);
 	glCullFace(GL_FRONT);
 
-	const auto lightView = glm::lookAt(camera.getPosition(), camera.getPosition() + dir, up);
 	const auto lightViewDir = glm::lookAt(origin, dir, up);
+	const auto lightView = lightViewDir * glm::translate(RelativePosition3D {-camera.getPosition()});
 	const auto lightViewPoint = camera.getPosition();
 	const auto bandViewExtents = getBandViewExtents(camera, lightView);