X-Git-Url: http://git.mutantstargoat.com/user/nuclear/?p=laserbrain_demo;a=blobdiff_plain;f=src%2Frenderer.cc;h=deff1b9b2f2b38972174f2bc4c90f918d592c67c;hp=bb274f21960f29b6f30da8de90ae79380d1ef0c4;hb=9480e20f4de41693ebd1f22e63d3bcecde878f70;hpb=fc00873a180b1b7272d94a32dcc40d0d44ed2b72

diff --git a/src/renderer.cc b/src/renderer.cc
index bb274f2..deff1b9 100644
--- a/src/renderer.cc
+++ b/src/renderer.cc
@@ -1,16 +1,65 @@
 #include "renderer.h"
+#include "rtarg.h"
+#include "app.h"
+#include "sdr.h"
+
+enum {
+	USE_TEXMAP = 1,
+	USE_MIRROR = 2,
+};
+static const char *use_flag_str[] = {
+	"#define USE_TEXMAP\n",
+	"#define USE_MIRROR\n"
+};
+#define NUM_USE_FLAGS	((int)(sizeof use_flag_str / sizeof *use_flag_str))
+
+
+static RenderTarget *rtmirror;
 
 Renderer::Renderer()
 {
 	mscn = 0;
+	ropt = RENDER_ALL;
+	shaders = 0;
 }
 
 Renderer::~Renderer()
 {
+	destroy();
+	delete [] shaders;
 }
 
 bool Renderer::init()
 {
+	static bool once;
+	if(!rtmirror && !once) {
+		once = true;
+		rtmirror = new RenderTarget;
+		if(!rtmirror->create(vp_width, vp_height, GL_SRGB)) {
+			error_log("failed to create mirror render target (%dx%d)\n", vp_width, vp_height);
+		}
+	}
+
+	int numsdr = 1 << NUM_USE_FLAGS;
+	shaders = new unsigned int[numsdr];
+
+	for(int i=0; i<numsdr; i++) {
+		clear_shader_header(0);
+
+		for(int j=0; j<NUM_USE_FLAGS; j++) {
+			if(i & (1 << j)) {
+				add_shader_header(0, use_flag_str[j]);
+			}
+		}
+
+		if(!(shaders[i] = create_program_load("sdr/lightmap.v.glsl", "sdr/lightmap.p.glsl"))) {
+			return false;
+		}
+		set_uniform_int(shaders[i], "texmap", MTL_TEX_DIFFUSE);
+		set_uniform_int(shaders[i], "lightmap", MTL_TEX_LIGHTMAP);
+		set_uniform_int(shaders[i], "mirrortex", MTL_TEX_REFLECT);
+	}
+
 	return true;
 }
 
@@ -28,16 +77,43 @@ MetaScene *Renderer::get_scene() const
 	return mscn;
 }
 
+// render mirror reflections if ...
+#define DO_MIRRORS	\
+	mscn->mirrors &&			/* scene contains mirrors */ \
+	(ropt & RENDER_MIRRORS) &&	/* mirror rendering is enabled */ \
+	rtmirror					/* mirror render target succesfully created */
+
 void Renderer::draw() const
 {
 	if(!mscn) return;
 
+	if(DO_MIRRORS && current_render_target() != rtmirror) {
+		// check if the render target needs resizing
+		if(rtmirror->get_width() != vp_width || rtmirror->get_height() != vp_height) {
+			if(!rtmirror->resize(vp_width, vp_height)) {
+				error_log("failed to resize mirror render target (%dx%d)\n", vp_width, vp_height);
+				goto abort_mirrors;
+			}
+		}
+
+		FlatMirror *mir = mscn->mirrors;
+		while(mir) {
+			draw_mirror(mir);
+			mir = mir->next;
+		}
+	}
+abort_mirrors:
+
 	int num = (int)mscn->scenes.size();
 	for(int i=0; i<num; i++) {
 		Scene *scn = mscn->scenes[i];
 
 		int nobj = (int)scn->objects.size();
 		for(int j=0; j<nobj; j++) {
+			// don't draw mirrors, we already did that earlier (if mirror rendering enabled)
+			if((ropt & RENDER_MIRRORS) && scn->objects[j]->mtl.flat_mirror) {
+				continue;
+			}
 			draw_object(scn->objects[j]);
 		}
 	}
@@ -56,6 +132,64 @@ void Renderer::draw_object(Object *obj) const
 	}
 
 	if(vis) {
+		unsigned int use_mask = 0;
+		if(obj->mtl.stdtex[MTL_TEX_DIFFUSE]) {
+			use_mask |= USE_TEXMAP;
+		}
+		if(obj->mtl.stdtex[MTL_TEX_REFLECT] && obj->mtl.flat_mirror) {
+			use_mask |= USE_MIRROR;
+		}
+
+		unsigned int sdr = shaders[use_mask];
+		if(use_mask & USE_MIRROR) {
+			float sx = 1.0f / rtmirror->texture()->get_width();
+			float sy = 1.0f / rtmirror->texture()->get_height();
+			set_uniform_float2(sdr, "mirtex_scale", sx, sy);
+			set_uniform_float(sdr, "reflectivity", obj->mtl.reflect);
+		}
+		bind_program(sdr);
+
 		obj->draw();
 	}
 }
+
+void Renderer::draw_mirror(FlatMirror *mir) const
+{
+	push_render_target(rtmirror);
+	glClearColor(1, 0, 0, 1);
+	glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+	glClearColor(1, 1, 1, 1);
+
+	glMatrixMode(GL_MODELVIEW);
+	glPushMatrix();
+
+	// TODO update mirror plane for movable mirrors?
+
+	Mat4 mirmat;
+	mirmat.mirror(mir->wplane.normal, dot(mir->wplane.normal, mir->wplane.pt));
+	glMultMatrixf(mirmat[0]);
+
+	glFrontFace(GL_CW);
+	draw();
+	glFrontFace(GL_CCW);
+
+	glPopMatrix();
+	pop_render_target();
+
+	if(dbg_key_pending & 1) {
+		dump_gl_texture(rtmirror->texture()->get_id(), "mirror.ppm");
+		dbg_key_pending &= ~1;
+	}
+
+	int nobj = mir->objects.size();
+	for(int i=0; i<nobj; i++) {
+		Object *obj = (Object*)mir->objects[i];
+
+		Texture *prev_refl_tex = obj->mtl.stdtex[MTL_TEX_REFLECT];
+		obj->mtl.stdtex[MTL_TEX_REFLECT] = rtmirror->texture();
+
+		draw_object(mir->objects[i]);
+
+		obj->mtl.stdtex[MTL_TEX_REFLECT] = prev_refl_tex;
+	}
+}