1 files changed, 163 insertions, 0 deletions
diff --git a/src/light.cpp b/src/light.cpp
new file mode 100644
index 0000000..ca68cda
--- /dev/null
+++ b/src/light.cpp
@@ -0,0 +1,163 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <assert.h>
+
+#include "rwbase.h"
+#include "rwerror.h"
+#include "rwplg.h"
+#include "rwpipeline.h"
+#include "rwobjects.h"
+#include "rwengine.h"
+
+#define PLUGIN_ID ID_LIGHT
+
+namespace rw {
+
+int32 Light::numAllocated;
+
+PluginList Light::s_plglist(sizeof(Light));
+
+static void
+lightSync(ObjectWithFrame*)
+{
+}
+
+static void
+worldLightSync(ObjectWithFrame *obj)
+{
+	Light *light = (Light*)obj;
+	light->originalSync(obj);
+}
+
+Light*
+Light::create(int32 type)
+{
+	Light *light = (Light*)rwMalloc(s_plglist.size, MEMDUR_EVENT | ID_LIGHT);
+	if(light == nil){
+		RWERROR((ERR_ALLOC, s_plglist.size));
+		return nil;
+	}
+	numAllocated++;
+	light->object.object.init(Light::ID, type);
+	light->object.syncCB = lightSync;
+	light->radius = 0.0f;
+	light->color.red = 1.0f;
+	light->color.green = 1.0f;
+	light->color.blue = 1.0f;
+	light->color.alpha = 1.0f;
+	light->minusCosAngle = 1.0f;
+	light->object.object.privateFlags = 1;
+	light->object.object.flags = LIGHTATOMICS | LIGHTWORLD;
+	light->inWorld.init();
+
+	// clump extension
+	light->clump = nil;
+	light->inClump.init();
+
+	// world extension
+	light->world = nil;
+	light->originalSync = light->object.syncCB;
+	light->object.syncCB = worldLightSync;
+
+	s_plglist.construct(light);
+	return light;
+}
+
+void
+Light::destroy(void)
+{
+	s_plglist.destruct(this);
+	assert(this->clump == nil);
+	assert(this->world == nil);
+	this->setFrame(nil);
+	rwFree(this);
+	numAllocated--;
+}
+
+void
+Light::setAngle(float32 angle)
+{
+	this->minusCosAngle = -cosf(angle);
+}
+
+float32
+Light::getAngle(void)
+{
+	return acosf(-this->minusCosAngle);
+}
+
+void
+Light::setColor(float32 r, float32 g, float32 b)
+{
+	this->color.red = r;
+	this->color.green = g;
+	this->color.blue = b;
+	this->object.object.privateFlags = r == g && r == b;
+}
+
+struct LightChunkData
+{
+	float32 radius;
+	float32 red, green, blue;
+	float32 minusCosAngle;
+	uint32 type_flags;
+};
+
+Light*
+Light::streamRead(Stream *stream)
+{
+	uint32 version;
+	LightChunkData buf;
+
+	if(!findChunk(stream, ID_STRUCT, nil, &version)){
+		RWERROR((ERR_CHUNK, "STRUCT"));
+		return nil;
+	}
+	stream->read32(&buf, sizeof(LightChunkData));
+	Light *light = Light::create(buf.type_flags>>16);
+	if(light == nil)
+		return nil;
+	light->radius = buf.radius;
+	light->setColor(buf.red, buf.green, buf.blue);
+	float32 a = buf.minusCosAngle;
+	if(version >= 0x30300)
+		light->minusCosAngle = a;
+	else
+		// tan -> -cos
+		light->minusCosAngle = -1.0f/sqrtf(a*a+1.0f);
+	light->object.object.flags = (uint8)buf.type_flags;
+	if(s_plglist.streamRead(stream, light))
+		return light;
+	light->destroy();
+	return nil;
+}
+
+bool
+Light::streamWrite(Stream *stream)
+{
+	LightChunkData buf;
+	writeChunkHeader(stream, ID_LIGHT, this->streamGetSize());
+	writeChunkHeader(stream, ID_STRUCT, sizeof(LightChunkData));
+	buf.radius = this->radius;
+	buf.red   = this->color.red;
+	buf.green = this->color.green;
+	buf.blue  = this->color.blue;
+	if(version >= 0x30300)
+		buf.minusCosAngle = this->minusCosAngle;
+	else
+		buf.minusCosAngle = tanf(acosf(-this->minusCosAngle));
+	buf.type_flags = (uint32)this->object.object.flags |
+		(uint32)this->object.object.subType << 16;
+	stream->write32(&buf, sizeof(LightChunkData));
+
+	s_plglist.streamWrite(stream, this);
+	return true;
+}
+
+uint32
+Light::streamGetSize(void)
+{
+	return 12 + sizeof(LightChunkData) + 12 + s_plglist.streamGetSize(this);
+}
+
+}