Added custom mtxProj() call to properly handle OGL NDC.

examples/03-raymarch/raymarch.cpp

@@ -30,7 +30,12 @@ struct PosColorTexCoord0Vertex
 
 bgfx::VertexDecl PosColorTexCoord0Vertex::ms_decl;
 
-static bool s_flipV = false;
+static bool s_oglNdc = false;
+
+inline void mtxProj(float* _result, float _fovy, float _aspect, float _near, float _far)
+{
+	bx::mtxProj(_result, _fovy, _aspect, _near, _far, s_oglNdc);
+}
 
 void renderScreenSpaceQuad(uint32_t _view, bgfx::ProgramHandle _program, float _x, float _y, float _width, float _height)
 {
@@ -128,7 +133,7 @@ int _main_(int /*_argc*/, char** /*_argv*/)
 
 	case bgfx::RendererType::OpenGL:
 	case bgfx::RendererType::OpenGLES:
-		s_flipV = true;
+		s_oglNdc = true;
 		break;
 	}
 
@@ -175,7 +180,7 @@ int _main_(int /*_argc*/, char** /*_argv*/)
 		float view[16];
 		float proj[16];
 		bx::mtxLookAt(view, eye, at);
-		bx::mtxProj(proj, 60.0f, float(width)/float(height), 0.1f, 100.0f);
+		mtxProj(proj, 60.0f, float(width)/float(height), 0.1f, 100.0f);
 
 		// Set view and projection matrix for view 1.
 		bgfx::setViewTransform(0, view, proj);

examples/09-hdr/hdr.cpp

@@ -8,6 +8,12 @@
 #include "imgui/imgui.h"
 
 static float s_texelHalf = 0.0f;
+static bool s_originBottomLeft = false;
+
+inline void mtxProj(float* _result, float _fovy, float _aspect, float _near, float _far)
+{
+	bx::mtxProj(_result, _fovy, _aspect, _near, _far, s_originBottomLeft);
+}
 
 struct PosColorTexCoord0Vertex
 {
@@ -209,7 +215,7 @@ int _main_(int /*_argc*/, char** /*_argv*/)
 
 	const bgfx::RendererType::Enum renderer = bgfx::getRendererType();
 	s_texelHalf = bgfx::RendererType::Direct3D9 == renderer ? 0.5f : 0.0f;
-	const bool  originBottomLeft = bgfx::RendererType::OpenGL == renderer || bgfx::RendererType::OpenGLES == renderer;
+	s_originBottomLeft = bgfx::RendererType::OpenGL == renderer || bgfx::RendererType::OpenGLES == renderer;
 
 	uint32_t oldWidth  = 0;
 	uint32_t oldHeight = 0;
@@ -372,7 +378,7 @@ int _main_(int /*_argc*/, char** /*_argv*/)
 		bgfx::setTexture(0, u_texColor, fbtextures[0]);
 		bgfx::setProgram(lumProgram);
 		bgfx::setState(BGFX_STATE_RGB_WRITE|BGFX_STATE_ALPHA_WRITE);
-		screenSpaceQuad(128.0f, 128.0f, originBottomLeft);
+		screenSpaceQuad(128.0f, 128.0f, s_originBottomLeft);
 		bgfx::submit(2);
 
 		// Downscale luminance 0.
@@ -380,7 +386,7 @@ int _main_(int /*_argc*/, char** /*_argv*/)
 		bgfx::setTexture(0, u_texColor, lum[0]);
 		bgfx::setProgram(lumAvgProgram);
 		bgfx::setState(BGFX_STATE_RGB_WRITE|BGFX_STATE_ALPHA_WRITE);
-		screenSpaceQuad(64.0f, 64.0f, originBottomLeft);
+		screenSpaceQuad(64.0f, 64.0f, s_originBottomLeft);
 		bgfx::submit(3);
 
 		// Downscale luminance 1.
@@ -388,7 +394,7 @@ int _main_(int /*_argc*/, char** /*_argv*/)
 		bgfx::setTexture(0, u_texColor, lum[1]);
 		bgfx::setProgram(lumAvgProgram);
 		bgfx::setState(BGFX_STATE_RGB_WRITE|BGFX_STATE_ALPHA_WRITE);
-		screenSpaceQuad(16.0f, 16.0f, originBottomLeft);
+		screenSpaceQuad(16.0f, 16.0f, s_originBottomLeft);
 		bgfx::submit(4);
 
 		// Downscale luminance 2.
@@ -396,7 +402,7 @@ int _main_(int /*_argc*/, char** /*_argv*/)
 		bgfx::setTexture(0, u_texColor, lum[2]);
 		bgfx::setProgram(lumAvgProgram);
 		bgfx::setState(BGFX_STATE_RGB_WRITE|BGFX_STATE_ALPHA_WRITE);
-		screenSpaceQuad(4.0f, 4.0f, originBottomLeft);
+		screenSpaceQuad(4.0f, 4.0f, s_originBottomLeft);
 		bgfx::submit(5);
 
 		// Downscale luminance 3.
@@ -404,7 +410,7 @@ int _main_(int /*_argc*/, char** /*_argv*/)
 		bgfx::setTexture(0, u_texColor, lum[3]);
 		bgfx::setProgram(lumAvgProgram);
 		bgfx::setState(BGFX_STATE_RGB_WRITE|BGFX_STATE_ALPHA_WRITE);
-		screenSpaceQuad(1.0f, 1.0f, originBottomLeft);
+		screenSpaceQuad(1.0f, 1.0f, s_originBottomLeft);
 		bgfx::submit(6);
 
 		float tonemap[4] = { middleGray, square(white), treshold, 0.0f };
@@ -416,14 +422,14 @@ int _main_(int /*_argc*/, char** /*_argv*/)
 		bgfx::setTexture(1, u_texLum, lum[4]);
 		bgfx::setProgram(brightProgram);
 		bgfx::setState(BGFX_STATE_RGB_WRITE|BGFX_STATE_ALPHA_WRITE);
-		screenSpaceQuad( (float)width/2.0f, (float)height/2.0f, originBottomLeft);
+		screenSpaceQuad( (float)width/2.0f, (float)height/2.0f, s_originBottomLeft);
 		bgfx::submit(7);
 
 		// Blur bright pass vertically.
 		bgfx::setTexture(0, u_texColor, bright);
 		bgfx::setProgram(blurProgram);
 		bgfx::setState(BGFX_STATE_RGB_WRITE|BGFX_STATE_ALPHA_WRITE);
-		screenSpaceQuad( (float)width/8.0f, (float)height/8.0f, originBottomLeft);
+		screenSpaceQuad( (float)width/8.0f, (float)height/8.0f, s_originBottomLeft);
 		bgfx::submit(8);
 
 		// Blur bright pass horizontally, do tonemaping and combine.
@@ -432,7 +438,7 @@ int _main_(int /*_argc*/, char** /*_argv*/)
 		bgfx::setTexture(2, u_texBlur, blur);
 		bgfx::setProgram(tonemapProgram);
 		bgfx::setState(BGFX_STATE_RGB_WRITE|BGFX_STATE_ALPHA_WRITE);
-		screenSpaceQuad( (float)width, (float)height, originBottomLeft);
+		screenSpaceQuad( (float)width, (float)height, s_originBottomLeft);
 		bgfx::submit(9);
 
 		// Advance to next frame. Rendering thread will be kicked to 

examples/13-stencil/stencil.cpp

@@ -151,6 +151,11 @@ static uint32_t s_viewMask = 0;
 static uint32_t s_clearMask = 0;
 static bgfx::UniformHandle u_texColor;
 
+inline void mtxProj(float* _result, float _fovy, float _aspect, float _near, float _far)
+{
+	bx::mtxProj(_result, _fovy, _aspect, _near, _far, s_flipV);
+}
+
 static void shaderFilePath(char* _out, const char* _name)
 {
 	strcpy(_out, s_shaderPath);
@@ -1004,7 +1009,7 @@ int _main_(int /*_argc*/, char** /*_argv*/)
 
 	// Set view and projection matrices.
 	const float aspect = float(viewState.m_width)/float(viewState.m_height);
-	bx::mtxProj(viewState.m_proj, 60.0f, aspect, 0.1f, 100.0f);
+	mtxProj(viewState.m_proj, 60.0f, aspect, 0.1f, 100.0f);
 
 	float initialPos[3] = { 0.0f, 18.0f, -40.0f };
 	cameraCreate();

examples/14-shadowvolumes/shadowvolumes.cpp

@@ -111,6 +111,7 @@ static const uint16_t s_planeIndices[] =
 };
 
 static const char* s_shaderPath = NULL;
+static bool s_oglNdc = false;
 static float s_texelHalf = 0.0f;
 
 static uint32_t s_viewMask = 0;
@@ -221,6 +222,11 @@ void setViewRectMask(uint32_t _viewMask, uint16_t _x, uint16_t _y, uint16_t _wid
 	}
 }
 
+inline void mtxProj(float* _result, float _fovy, float _aspect, float _near, float _far)
+{
+	bx::mtxProj(_result, _fovy, _aspect, _near, _far, s_oglNdc);
+}
+
 void mtxBillboard(float* __restrict _result
 				  , const float* __restrict _view
 				  , const float* __restrict _pos
@@ -1951,10 +1957,12 @@ int _main_(int /*_argc*/, char** /*_argv*/)
 
 	case bgfx::RendererType::OpenGL:
 		s_shaderPath = "shaders/glsl/";
+		s_oglNdc = true;
 		break;
 
 	case bgfx::RendererType::OpenGLES:
 		s_shaderPath = "shaders/gles/";
+		s_oglNdc = true;
 		break;
 	}
 
@@ -2163,7 +2171,7 @@ int _main_(int /*_argc*/, char** /*_argv*/)
 	const float aspect = float(viewState.m_width)/float(viewState.m_height);
 	const float nearPlane = 1.0f;
 	const float farPlane = 1000.0f;
-	bx::mtxProj(viewState.m_proj, fov, aspect, nearPlane, farPlane);
+	mtxProj(viewState.m_proj, fov, aspect, nearPlane, farPlane);
 
 	float initialPos[3] = { 3.0f, 20.0f, -58.0f };
 	cameraCreate();

examples/15-shadowmaps-simple/shadowmaps_simple.cpp

@@ -71,6 +71,11 @@ static float s_texelHalf = 0.0f;
 bgfx::FrameBufferHandle s_shadowMapFB;
 static bgfx::UniformHandle u_shadowMap;
 
+inline void mtxProj(float* _result, float _fovy, float _aspect, float _near, float _far)
+{
+	bx::mtxProj(_result, _fovy, _aspect, _near, _far, s_flipV);
+}
+
 static void shaderFilePath(char* _out, const char* _name)
 {
 	strcpy(_out, s_shaderPath);
@@ -486,7 +491,7 @@ int _main_(int /*_argc*/, char** /*_argv*/)
 	bx::mtxLookAt(view, eye, at);
 
 	const float aspect = float(int32_t(width) ) / float(int32_t(height) );
-	bx::mtxProj(proj, 60.0f, aspect, 0.1f, 1000.0f);
+	mtxProj(proj, 60.0f, aspect, 0.1f, 1000.0f);
 
 	// Time acumulators.
 	float timeAccumulatorLight = 0.0f;

examples/19-oit/oit.cpp

@@ -83,6 +83,11 @@ static const uint16_t s_cubeIndices[36] =
 static float s_texelHalf = 0.0f;
 static bool s_flipV = false;
 
+inline void mtxProj(float* _result, float _fovy, float _aspect, float _near, float _far)
+{
+	bx::mtxProj(_result, _fovy, _aspect, _near, _far, s_flipV);
+}
+
 void screenSpaceQuad(float _textureWidth, float _textureHeight, bool _originBottomLeft = false, float _width = 1.0f, float _height = 1.0f)
 {
 	if (bgfx::checkAvailTransientVertexBuffer(3, PosColorTexCoord0Vertex::ms_decl) )
@@ -303,7 +308,7 @@ int _main_(int /*_argc*/, char** /*_argv*/)
 
 		// Set view and projection matrix for view 0.
 		bx::mtxLookAt(view, eye, at);
-		bx::mtxProj(proj, 60.0f, float(width)/float(height), 0.1f, 100.0f);
+		mtxProj(proj, 60.0f, float(width)/float(height), 0.1f, 100.0f);
 
 		bgfx::setViewTransform(0, view, proj);
 

examples/21-deferred/deferred.cpp

@@ -15,6 +15,13 @@
 #define RENDER_PASS_DEBUG_LIGHTS_ID   3
 #define RENDER_PASS_DEBUG_GBUFFER_ID  4
 
+static bool s_originBottomLeft = false;
+
+inline void mtxProj(float* _result, float _fovy, float _aspect, float _near, float _far)
+{
+	bx::mtxProj(_result, _fovy, _aspect, _near, _far, s_originBottomLeft);
+}
+
 struct PosNormalTangentTexcoordVertex
 {
 	float m_x;
@@ -303,7 +310,7 @@ int _main_(int /*_argc*/, char** /*_argv*/)
 	const int64_t timeOffset = bx::getHPCounter();
 	const bgfx::RendererType::Enum renderer = bgfx::getRendererType();
 	const float texelHalf = bgfx::RendererType::Direct3D9 == renderer ? 0.5f : 0.0f;
-	const bool  originBottomLeft = bgfx::RendererType::OpenGL == renderer || bgfx::RendererType::OpenGLES == renderer;
+	s_originBottomLeft = bgfx::RendererType::OpenGL == renderer || bgfx::RendererType::OpenGLES == renderer;
 
 	// Get renderer capabilities info.
 	const bgfx::Caps* caps = bgfx::getCaps();
@@ -448,7 +455,7 @@ int _main_(int /*_argc*/, char** /*_argv*/)
 				bgfx::setViewFrameBuffer(RENDER_PASS_LIGHT_ID, lightBuffer);
 
 				float proj[16];
-				bx::mtxProj(proj, 60.0f, float(width)/float(height), 0.1f, 100.0f);
+				mtxProj(proj, 60.0f, float(width)/float(height), 0.1f, 100.0f);
 
 				bgfx::setViewFrameBuffer(RENDER_PASS_GEOMETRY_ID, gbuffer);
 				bgfx::setViewTransform(RENDER_PASS_GEOMETRY_ID, view, proj);
@@ -647,7 +654,7 @@ int _main_(int /*_argc*/, char** /*_argv*/)
 						| BGFX_STATE_ALPHA_WRITE
 						| BGFX_STATE_BLEND_ADD
 						);
-					screenSpaceQuad( (float)width, (float)height, texelHalf, originBottomLeft);
+					screenSpaceQuad( (float)width, (float)height, texelHalf, s_originBottomLeft);
 					bgfx::submit(RENDER_PASS_LIGHT_ID);
 				}
 			}
@@ -660,7 +667,7 @@ int _main_(int /*_argc*/, char** /*_argv*/)
 				| BGFX_STATE_RGB_WRITE
 				| BGFX_STATE_ALPHA_WRITE
 				);
-			screenSpaceQuad( (float)width, (float)height, texelHalf, originBottomLeft);
+			screenSpaceQuad( (float)width, (float)height, texelHalf, s_originBottomLeft);
 			bgfx::submit(RENDER_PASS_COMBINE_ID);
 
 			if (showGBuffer)