Import aap/librw @ masterHEADmaster

Snapshot for re3/reVC vendoring, per @lzcnt.
Source: https://github.com/aap/librw (master).

1 files changed, 141 insertions, 0 deletions

diff --git a/tools/subrast/subrast.cpp b/tools/subrast/subrast.cpp
new file mode 100644
index 0000000..f91298f
--- /dev/null
+++ b/tools/subrast/subrast.cpp
@@ -0,0 +1,141 @@
+#include <rw.h>
+#include <skeleton.h>
+
+#include "subrast.h"
+
+rw::Camera *Camera;
+rw::Camera *SubCameras[4];
+
+void
+CameraSetViewWindow(rw::Camera *camera, float width, float height, float vw)
+{
+	rw::V2d viewWindow;
+
+	// TODO: aspect ratio when fullscreen
+	if(width > height){
+		viewWindow.x = vw;
+		viewWindow.y = vw / (width/height);
+	}else{
+		viewWindow.x = vw / (height/width);
+		viewWindow.y = vw;
+	}
+
+	camera->setViewWindow(&viewWindow);
+}
+
+void
+UpdateSubRasters(rw::Camera *mainCamera, rw::int32 mainWidth, rw::int32 mainHeight)
+{
+	rw::Rect rect[4];
+	float width, height, border;
+
+	border = mainHeight*0.05f;
+
+	width = (mainWidth - border*3.0f) / 2.0f;
+	height = (mainHeight - border*3.0f) / 2.0f;
+
+	// top left
+	rect[0].x = border;
+	rect[0].y = border;
+	rect[0].w = width;
+	rect[0].h = height;
+
+	// top right
+	rect[1].x = border*2 + width;
+	rect[1].y = border;
+	rect[1].w = width;
+	rect[1].h = height;
+
+	// bottom left
+	rect[2].x = border;
+	rect[2].y = border*2 + height;
+	rect[2].w = width;
+	rect[2].h = height;
+
+	// bottom left
+	rect[3].x = border*2 + width;
+	rect[3].y = border*2 + height;
+	rect[3].w = width;
+	rect[3].h = height;
+
+	CameraSetViewWindow(SubCameras[0], width, height, 0.5f);
+	for(int i = 1; i < 4; i++)
+		CameraSetViewWindow(SubCameras[i], width, height, 0.5f + 0.4f);
+
+	for(int i = 0; i < 4; i++){
+		SubCameras[i]->frameBuffer->subRaster(mainCamera->frameBuffer, &rect[i]);
+		SubCameras[i]->zBuffer->subRaster(mainCamera->zBuffer, &rect[i]);
+	}
+}
+
+void
+PositionSubCameras(void)
+{
+	rw::Frame *frame;
+	rw::V3d pos;
+	const float dist = 2.5f;
+
+	// perspective
+	pos.x = pos.y = 0.0f;
+	pos.z = -4.0f;
+	frame = SubCameras[0]->getFrame();
+	frame->translate(&pos, rw::COMBINEREPLACE);
+
+	// look along z
+	pos.x = pos.y = 0.0f;
+	pos.z = -dist;
+	frame = SubCameras[1]->getFrame();
+	frame->translate(&pos, rw::COMBINEREPLACE);
+
+	// look along x
+	pos.x = -dist;
+	pos.y = pos.z = 0.0f;
+	frame = SubCameras[2]->getFrame();
+	frame->rotate(&Yaxis, 90.0f, rw::COMBINEREPLACE);
+	frame->translate(&pos, rw::COMBINEPOSTCONCAT);
+
+	// look along y
+	pos.x = pos.z = 0.0f;
+	pos.y = -dist;
+	frame = SubCameras[3]->getFrame();
+	frame->rotate(&Xaxis, -90.0f, rw::COMBINEREPLACE);
+	frame->translate(&pos, rw::COMBINEPOSTCONCAT);
+}
+
+void
+CreateCameras(rw::World *world)
+{
+	Camera = sk::CameraCreate(sk::globals.width, sk::globals.height, 1);
+	assert(Camera);
+
+	for(int i = 0; i < 4; i++){
+		SubCameras[i] = sk::CameraCreate(0, 0, 1);
+		assert(SubCameras[i]);
+
+		SubCameras[i]->setNearPlane(0.1f);
+		SubCameras[i]->setFarPlane(30.0f);
+
+		world->addCamera(SubCameras[i]);
+
+		if(i > 0)
+			SubCameras[i]->setProjection(rw::Camera::PARALLEL);
+	}
+
+	PositionSubCameras();
+}
+
+void
+DestroyCameras(rw::World *world)
+{
+	if(Camera){
+		sk::CameraDestroy(Camera);
+		Camera = nil;
+	}
+
+	for(int i = 0; i < 4; i++)
+		if(SubCameras[i]){
+			world->removeCamera(SubCameras[i]);
+			sk::CameraDestroy(SubCameras[i]);
+			SubCameras[i] = nil;
+		}
+}