diff --git a/examples/textured_cube/Makefile b/examples/textured_cube/Makefile new file mode 100644 index 0000000..238a1f3 --- /dev/null +++ b/examples/textured_cube/Makefile @@ -0,0 +1,177 @@ +#--------------------------------------------------------------------------------- +.SUFFIXES: +#--------------------------------------------------------------------------------- + +ifeq ($(strip $(DEVKITARM)),) +$(error "Please set DEVKITARM in your environment. export DEVKITARM=devkitARM") +endif + +TOPDIR ?= $(CURDIR) +include $(DEVKITARM)/3ds_rules + +#--------------------------------------------------------------------------------- +# TARGET is the name of the output +# BUILD is the directory where object files & intermediate files will be placed +# SOURCES is a list of directories containing source code +# DATA is a list of directories containing data files +# INCLUDES is a list of directories containing header files +# +# NO_SMDH: if set to anything, no SMDH file is generated. +# APP_TITLE is the name of the app stored in the SMDH file (Optional) +# APP_DESCRIPTION is the description of the app stored in the SMDH file (Optional) +# APP_AUTHOR is the author of the app stored in the SMDH file (Optional) +# ICON is the filename of the icon (.png), relative to the project folder. +# If not set, it attempts to use one of the following (in this order): +# - .png +# - icon.png +# - /default_icon.png +#--------------------------------------------------------------------------------- +TARGET := $(notdir $(CURDIR)) +BUILD := build +SOURCES := source +DATA := data +INCLUDES := include + +#--------------------------------------------------------------------------------- +# options for code generation +#--------------------------------------------------------------------------------- +ARCH := -march=armv6k -mtune=mpcore -mfloat-abi=hard + +CFLAGS := -g -Wall -O2 -mword-relocations \ + -fomit-frame-pointer -ffast-math \ + $(ARCH) + +CFLAGS += $(INCLUDE) -DARM11 -D_3DS + +CXXFLAGS := $(CFLAGS) -fno-rtti -fno-exceptions -std=gnu++11 + +ASFLAGS := -g $(ARCH) +LDFLAGS = -specs=3dsx.specs -g $(ARCH) -Wl,-Map,$(notdir $*.map) -Wl,--gc-sections + +LIBS := -lcitro3d -lctru -lm + +#--------------------------------------------------------------------------------- +# list of directories containing libraries, this must be the top level containing +# include and lib +#--------------------------------------------------------------------------------- +LIBDIRS := $(CTRULIB) $(CURDIR)/../.. + + +#--------------------------------------------------------------------------------- +# no real need to edit anything past this point unless you need to add additional +# rules for different file extensions +#--------------------------------------------------------------------------------- +ifneq ($(BUILD),$(notdir $(CURDIR))) +#--------------------------------------------------------------------------------- + +export OUTPUT := $(CURDIR)/$(TARGET) +export TOPDIR := $(CURDIR) + +export VPATH := $(foreach dir,$(SOURCES),$(CURDIR)/$(dir)) \ + $(foreach dir,$(DATA),$(CURDIR)/$(dir)) + +export DEPSDIR := $(CURDIR)/$(BUILD) + +CFILES := $(foreach dir,$(SOURCES),$(notdir $(wildcard $(dir)/*.c))) +CPPFILES := $(foreach dir,$(SOURCES),$(notdir $(wildcard $(dir)/*.cpp))) +SFILES := $(foreach dir,$(SOURCES),$(notdir $(wildcard $(dir)/*.s))) +PICAFILES := $(foreach dir,$(SOURCES),$(notdir $(wildcard $(dir)/*.pica))) +BINFILES := $(foreach dir,$(DATA),$(notdir $(wildcard $(dir)/*.*))) + +#--------------------------------------------------------------------------------- +# use CXX for linking C++ projects, CC for standard C +#--------------------------------------------------------------------------------- +ifeq ($(strip $(CPPFILES)),) +#--------------------------------------------------------------------------------- + export LD := $(CC) +#--------------------------------------------------------------------------------- +else +#--------------------------------------------------------------------------------- + export LD := $(CXX) +#--------------------------------------------------------------------------------- +endif +#--------------------------------------------------------------------------------- + +export OFILES := $(addsuffix .o,$(BINFILES)) $(PICAFILES:.pica=.shbin.o) \ + $(CPPFILES:.cpp=.o) $(CFILES:.c=.o) $(SFILES:.s=.o) + +export INCLUDE := $(foreach dir,$(INCLUDES),-I$(CURDIR)/$(dir)) \ + $(foreach dir,$(LIBDIRS),-I$(dir)/include) \ + -I$(CURDIR)/$(BUILD) + +export LIBPATHS := $(foreach dir,$(LIBDIRS),-L$(dir)/lib) + +ifeq ($(strip $(ICON)),) + icons := $(wildcard *.png) + ifneq (,$(findstring $(TARGET).png,$(icons))) + export APP_ICON := $(TOPDIR)/$(TARGET).png + else + ifneq (,$(findstring icon.png,$(icons))) + export APP_ICON := $(TOPDIR)/icon.png + endif + endif +else + export APP_ICON := $(TOPDIR)/$(ICON) +endif + +ifeq ($(strip $(NO_SMDH)),) + export _3DSXFLAGS += --smdh=$(CURDIR)/$(TARGET).smdh +endif + +.PHONY: $(BUILD) clean all + +#--------------------------------------------------------------------------------- +all: $(BUILD) + +$(BUILD): + @[ -d $@ ] || mkdir -p $@ + @$(MAKE) --no-print-directory -C $(BUILD) -f $(CURDIR)/Makefile + +#--------------------------------------------------------------------------------- +clean: + @echo clean ... + @rm -fr $(BUILD) $(TARGET).3dsx $(OUTPUT).smdh $(TARGET).elf + + +#--------------------------------------------------------------------------------- +else + +DEPENDS := $(OFILES:.o=.d) + +#--------------------------------------------------------------------------------- +# main targets +#--------------------------------------------------------------------------------- +ifeq ($(strip $(NO_SMDH)),) +$(OUTPUT).3dsx : $(OUTPUT).elf $(OUTPUT).smdh +else +$(OUTPUT).3dsx : $(OUTPUT).elf +endif + +$(OUTPUT).elf : $(OFILES) + +#--------------------------------------------------------------------------------- +# you need a rule like this for each extension you use as binary data +#--------------------------------------------------------------------------------- +%.bin.o : %.bin +#--------------------------------------------------------------------------------- + @echo $(notdir $<) + @$(bin2o) + +#--------------------------------------------------------------------------------- +# rule for assembling GPU shaders +#--------------------------------------------------------------------------------- +%.shbin.o: %.pica + @echo $(notdir $<) + $(eval CURBIN := $(patsubst %.pica,%.shbin,$(notdir $<))) + $(eval CURH := $(patsubst %.pica,%.psh.h,$(notdir $<))) + @picasso -h $(CURH) -o $(CURBIN) $< + @bin2s $(CURBIN) | $(AS) -o $@ + @echo "extern const u8" `(echo $(CURBIN) | sed -e 's/^\([0-9]\)/_\1/' | tr . _)`"_end[];" > `(echo $(CURBIN) | tr . _)`.h + @echo "extern const u8" `(echo $(CURBIN) | sed -e 's/^\([0-9]\)/_\1/' | tr . _)`"[];" >> `(echo $(CURBIN) | tr . _)`.h + @echo "extern const u32" `(echo $(CURBIN) | sed -e 's/^\([0-9]\)/_\1/' | tr . _)`_size";" >> `(echo $(CURBIN) | tr . _)`.h + +-include $(DEPENDS) + +#--------------------------------------------------------------------------------------- +endif +#--------------------------------------------------------------------------------------- diff --git a/examples/textured_cube/data/kitten.bin b/examples/textured_cube/data/kitten.bin new file mode 100644 index 0000000..a87ac4a Binary files /dev/null and b/examples/textured_cube/data/kitten.bin differ diff --git a/examples/textured_cube/source/main.c b/examples/textured_cube/source/main.c new file mode 100644 index 0000000..a833925 --- /dev/null +++ b/examples/textured_cube/source/main.c @@ -0,0 +1,233 @@ +#include <3ds.h> +#include +#include +#include "vshader_shbin.h" +#include "kitten_bin.h" + +#define CLEAR_COLOR 0x68B0D8FF + +#define DISPLAY_TRANSFER_FLAGS \ + (GX_TRANSFER_FLIP_VERT(0) | GX_TRANSFER_OUT_TILED(0) | GX_TRANSFER_RAW_COPY(0) | \ + GX_TRANSFER_IN_FORMAT(GX_TRANSFER_FMT_RGBA8) | GX_TRANSFER_OUT_FORMAT(GX_TRANSFER_FMT_RGB8) | \ + GX_TRANSFER_SCALING(GX_TRANSFER_SCALE_NO)) + +typedef struct { float position[3]; float texcoord[2]; float normal[3]; } vertex; + +static const vertex vertex_list[] = +{ + // First face (PZ) + // First triangle + { {-0.5f, -0.5f, +0.5f}, {0.0f, 0.0f}, {0.0f, 0.0f, +1.0f} }, + { {+0.5f, -0.5f, +0.5f}, {1.0f, 0.0f}, {0.0f, 0.0f, +1.0f} }, + { {+0.5f, +0.5f, +0.5f}, {1.0f, 1.0f}, {0.0f, 0.0f, +1.0f} }, + // Second triangle + { {+0.5f, +0.5f, +0.5f}, {1.0f, 1.0f}, {0.0f, 0.0f, +1.0f} }, + { {-0.5f, +0.5f, +0.5f}, {0.0f, 1.0f}, {0.0f, 0.0f, +1.0f} }, + { {-0.5f, -0.5f, +0.5f}, {0.0f, 0.0f}, {0.0f, 0.0f, +1.0f} }, + + // Second face (MZ) + // First triangle + { {-0.5f, -0.5f, -0.5f}, {0.0f, 0.0f}, {0.0f, 0.0f, -1.0f} }, + { {-0.5f, +0.5f, -0.5f}, {1.0f, 0.0f}, {0.0f, 0.0f, -1.0f} }, + { {+0.5f, +0.5f, -0.5f}, {1.0f, 1.0f}, {0.0f, 0.0f, -1.0f} }, + // Second triangle + { {+0.5f, +0.5f, -0.5f}, {1.0f, 1.0f}, {0.0f, 0.0f, -1.0f} }, + { {+0.5f, -0.5f, -0.5f}, {0.0f, 1.0f}, {0.0f, 0.0f, -1.0f} }, + { {-0.5f, -0.5f, -0.5f}, {0.0f, 0.0f}, {0.0f, 0.0f, -1.0f} }, + + // Third face (PX) + // First triangle + { {+0.5f, -0.5f, -0.5f}, {0.0f, 0.0f}, {+1.0f, 0.0f, 0.0f} }, + { {+0.5f, +0.5f, -0.5f}, {1.0f, 0.0f}, {+1.0f, 0.0f, 0.0f} }, + { {+0.5f, +0.5f, +0.5f}, {1.0f, 1.0f}, {+1.0f, 0.0f, 0.0f} }, + // Second triangle + { {+0.5f, +0.5f, +0.5f}, {1.0f, 1.0f}, {+1.0f, 0.0f, 0.0f} }, + { {+0.5f, -0.5f, +0.5f}, {0.0f, 1.0f}, {+1.0f, 0.0f, 0.0f} }, + { {+0.5f, -0.5f, -0.5f}, {0.0f, 0.0f}, {+1.0f, 0.0f, 0.0f} }, + + // Fourth face (MX) + // First triangle + { {-0.5f, -0.5f, -0.5f}, {0.0f, 0.0f}, {-1.0f, 0.0f, 0.0f} }, + { {-0.5f, -0.5f, +0.5f}, {1.0f, 0.0f}, {-1.0f, 0.0f, 0.0f} }, + { {-0.5f, +0.5f, +0.5f}, {1.0f, 1.0f}, {-1.0f, 0.0f, 0.0f} }, + // Second triangle + { {-0.5f, +0.5f, +0.5f}, {1.0f, 1.0f}, {-1.0f, 0.0f, 0.0f} }, + { {-0.5f, +0.5f, -0.5f}, {0.0f, 1.0f}, {-1.0f, 0.0f, 0.0f} }, + { {-0.5f, -0.5f, -0.5f}, {0.0f, 0.0f}, {-1.0f, 0.0f, 0.0f} }, + + // Fifth face (PY) + // First triangle + { {-0.5f, +0.5f, -0.5f}, {0.0f, 0.0f}, {0.0f, +1.0f, 0.0f} }, + { {-0.5f, +0.5f, +0.5f}, {1.0f, 0.0f}, {0.0f, +1.0f, 0.0f} }, + { {+0.5f, +0.5f, +0.5f}, {1.0f, 1.0f}, {0.0f, +1.0f, 0.0f} }, + // Second triangle + { {+0.5f, +0.5f, +0.5f}, {1.0f, 1.0f}, {0.0f, +1.0f, 0.0f} }, + { {+0.5f, +0.5f, -0.5f}, {0.0f, 1.0f}, {0.0f, +1.0f, 0.0f} }, + { {-0.5f, +0.5f, -0.5f}, {0.0f, 0.0f}, {0.0f, +1.0f, 0.0f} }, + + // Sixth face (MY) + // First triangle + { {-0.5f, -0.5f, -0.5f}, {0.0f, 0.0f}, {0.0f, -1.0f, 0.0f} }, + { {+0.5f, -0.5f, -0.5f}, {1.0f, 0.0f}, {0.0f, -1.0f, 0.0f} }, + { {+0.5f, -0.5f, +0.5f}, {1.0f, 1.0f}, {0.0f, -1.0f, 0.0f} }, + // Second triangle + { {+0.5f, -0.5f, +0.5f}, {1.0f, 1.0f}, {0.0f, -1.0f, 0.0f} }, + { {-0.5f, -0.5f, +0.5f}, {0.0f, 1.0f}, {0.0f, -1.0f, 0.0f} }, + { {-0.5f, -0.5f, -0.5f}, {0.0f, 0.0f}, {0.0f, -1.0f, 0.0f} }, +}; + +#define vertex_list_count (sizeof(vertex_list)/sizeof(vertex_list[0])) + +static DVLB_s* vshader_dvlb; +static shaderProgram_s program; +static int uLoc_projection, uLoc_modelView; +static int uLoc_lightVec, uLoc_lightHalfVec, uLoc_lightClr, uLoc_material; +static C3D_Mtx projection; +static C3D_Mtx material = +{ + { + { { 0.0f, 0.2f, 0.2f, 0.2f } }, // Ambient + { { 0.0f, 0.4f, 0.4f, 0.4f } }, // Diffuse + { { 0.0f, 0.8f, 0.8f, 0.8f } }, // Specular + { { 1.0f, 0.0f, 0.0f, 0.0f } }, // Emission + } +}; + +static void* vbo_data; +static C3D_Tex kitten_tex; +static float angleX = 0.0, angleY = 0.0; + +static void sceneInit(void) +{ + // Load the vertex shader, create a shader program and bind it + vshader_dvlb = DVLB_ParseFile((u32*)vshader_shbin, vshader_shbin_size); + shaderProgramInit(&program); + shaderProgramSetVsh(&program, &vshader_dvlb->DVLE[0]); + C3D_BindProgram(&program); + + // Get the location of the uniforms + uLoc_projection = shaderInstanceGetUniformLocation(program.vertexShader, "projection"); + uLoc_modelView = shaderInstanceGetUniformLocation(program.vertexShader, "modelView"); + uLoc_lightVec = shaderInstanceGetUniformLocation(program.vertexShader, "lightVec"); + uLoc_lightHalfVec = shaderInstanceGetUniformLocation(program.vertexShader, "lightHalfVec"); + uLoc_lightClr = shaderInstanceGetUniformLocation(program.vertexShader, "lightClr"); + uLoc_material = shaderInstanceGetUniformLocation(program.vertexShader, "material"); + + // Configure attributes for use with the vertex shader + C3D_AttrInfo* attrInfo = C3D_GetAttrInfo(); + AttrInfo_Init(attrInfo); + AttrInfo_AddLoader(attrInfo, 0, GPU_FLOAT, 3); // v0=position + AttrInfo_AddLoader(attrInfo, 1, GPU_FLOAT, 2); // v1=texcoord + AttrInfo_AddLoader(attrInfo, 2, GPU_FLOAT, 3); // v2=normal + + // Compute the projection matrix + Mtx_PerspTilt(&projection, 80.0f*M_PI/180.0f, 400.0f/240.0f, 0.01f, 1000.0f); + + // Create the VBO (vertex buffer object) + vbo_data = linearAlloc(sizeof(vertex_list)); + memcpy(vbo_data, vertex_list, sizeof(vertex_list)); + + // Configure buffers + C3D_BufInfo* bufInfo = C3D_GetBufInfo(); + BufInfo_Init(bufInfo); + BufInfo_Add(bufInfo, vbo_data, sizeof(vertex), 3, 0x210); + + // Load the texture and bind it to the first texture unit + C3D_TexInit(&kitten_tex, 64, 64, GPU_RGBA8); + C3D_TexUpload(&kitten_tex, kitten_bin); + C3D_TexSetFilter(&kitten_tex, GPU_LINEAR, GPU_NEAREST); + C3D_TexBind(0, &kitten_tex); + + // Configure the first fragment shading substage to blend the texture color with + // the vertex color (calculated by the vertex shader using a lighting algorithm) + // See https://www.opengl.org/sdk/docs/man2/xhtml/glTexEnv.xml for more insight + C3D_TexEnv* env = C3D_GetTexEnv(0); + C3D_TexEnvSrc(env, C3D_Both, GPU_TEXTURE0, GPU_PRIMARY_COLOR, 0); + C3D_TexEnvOp(env, C3D_Both, 0, 0, 0); + C3D_TexEnvFunc(env, C3D_Both, GPU_MODULATE); +} + +static void sceneRender(void) +{ + // Calculate the modelView matrix + C3D_Mtx modelView; + Mtx_Identity(&modelView); + Mtx_Translate(&modelView, 0.0, 0.0, -2.0 + 0.5*sinf(angleX)); + Mtx_RotateX(&modelView, angleX, true); + Mtx_RotateY(&modelView, angleY, true); + + // Rotate the cube each frame + angleX += M_PI / 180; + angleY += M_PI / 360; + + // Update the uniforms + memcpy(C3D_FVUnifWritePtr(GPU_VERTEX_SHADER, uLoc_projection, 4), &projection, sizeof(C3D_Mtx)); + memcpy(C3D_FVUnifWritePtr(GPU_VERTEX_SHADER, uLoc_modelView, 4), &modelView, sizeof(C3D_Mtx)); + memcpy(C3D_FVUnifWritePtr(GPU_VERTEX_SHADER, uLoc_material, 4), &material, sizeof(C3D_Mtx)); + memcpy(C3D_FVUnifWritePtr(GPU_VERTEX_SHADER, uLoc_lightVec, 1), (float[]){0.0f, -1.0f, 0.0f, 0.0f}, sizeof(C3D_FVec)); + memcpy(C3D_FVUnifWritePtr(GPU_VERTEX_SHADER, uLoc_lightHalfVec, 1), (float[]){0.0f, -1.0f, 0.0f, 0.0f}, sizeof(C3D_FVec)); + memcpy(C3D_FVUnifWritePtr(GPU_VERTEX_SHADER, uLoc_lightClr, 1), (float[]){1.0f, 1.0f, 1.0f, 1.0f}, sizeof(C3D_FVec)); + + // Draw the VBO + C3D_DrawArrays(GPU_TRIANGLES, 0, vertex_list_count); +} + +static void sceneExit(void) +{ + // Free the texture + C3D_TexDelete(&kitten_tex); + + // Free the VBO + linearFree(vbo_data); + + // Free the shader program + shaderProgramFree(&program); + DVLB_Free(vshader_dvlb); +} + +int main() +{ + // Initialize graphics + gfxInitDefault(); + C3D_Init(C3D_DEFAULT_CMDBUF_SIZE); + + // Initialize the renderbuffer + static C3D_RenderBuf rb; + C3D_RenderBufInit(&rb, 240, 400, GPU_RB_RGBA8, GPU_RB_DEPTH24_STENCIL8); + rb.clearColor = CLEAR_COLOR; + C3D_RenderBufClear(&rb); + C3D_RenderBufBind(&rb); + + // Initialize the scene + sceneInit(); + + // Main loop + while (aptMainLoop()) + { + gspWaitForVBlank(); // Synchronize with the start of VBlank + gfxSwapBuffersGpu(); // Swap the framebuffers so that the frame that we rendered last frame is now visible + hidScanInput(); // Read the user input + + // Respond to user input + u32 kDown = hidKeysDown(); + if (kDown & KEY_START) + break; // break in order to return to hbmenu + + // Render the scene + sceneRender(); + C3D_Flush(); + C3D_RenderBufTransfer(&rb, (u32*)gfxGetFramebuffer(GFX_TOP, GFX_LEFT, NULL, NULL), DISPLAY_TRANSFER_FLAGS); + C3D_RenderBufClear(&rb); + + // Flush the framebuffers out of the data cache (not necessary with pure GPU rendering) + gfxFlushBuffers(); + } + + // Deinitialize the scene + sceneExit(); + + // Deinitialize graphics + C3D_Fini(); + gfxExit(); + return 0; +} diff --git a/examples/textured_cube/source/vshader.pica b/examples/textured_cube/source/vshader.pica new file mode 100644 index 0000000..af7f46e --- /dev/null +++ b/examples/textured_cube/source/vshader.pica @@ -0,0 +1,90 @@ +; Example PICA200 vertex shader + +; Uniforms +.fvec projection[4], modelView[4] +.fvec lightVec, lightHalfVec, lightClr, material[4] +.alias mat_amb material[0] +.alias mat_dif material[1] +.alias mat_spe material[2] +.alias mat_emi material[3] + +; Constants +.constf myconst(0.0, 1.0, -1.0, -0.5) +.alias zeros myconst.xxxx ; Vector full of zeros +.alias ones myconst.yyyy ; Vector full of ones + +; Outputs +.out outpos position +.out outtc0 texcoord0 +.out outclr color + +; Inputs (defined as aliases for convenience) +.alias inpos v0 +.alias intex v1 +.alias innrm v2 + +.proc main + ; Force the w component of inpos to be 1.0 + mov r0.xyz, inpos + mov r0.w, ones + + ; r1 = modelView * inpos + dp4 r1.x, modelView[0], r0 + dp4 r1.y, modelView[1], r0 + dp4 r1.z, modelView[2], r0 + dp4 r1.w, modelView[3], r0 + + ; outpos = projection * r1 + dp4 outpos.x, projection[0], r1 + dp4 outpos.y, projection[1], r1 + dp4 outpos.z, projection[2], r1 + dp4 outpos.w, projection[3], r1 + + ; outtex = intex + mov outtc0, intex + + ; Transform the normal vector with the modelView matrix + ; r1 = normalize(modelView * innrm) + mov r0.xyz, innrm + mov r0.w, zeros + dp4 r1.x, modelView[0], r0 + dp4 r1.y, modelView[1], r0 + dp4 r1.z, modelView[2], r0 + mov r1.w, zeros + dp3 r2, r1, r1 ; r2 = x^2+y^2+z^2 for each component + rsq r2, r2 ; r2 = 1/sqrt(r2) '' + mul r1, r2, r1 ; r1 = r1*r2 + + ; Calculate the diffuse level (r0.x) and the shininess level (r0.y) + ; r0.x = max(0, -(lightVec * r1)) + ; r0.y = max(0, (-lightHalfVec[i]) * r1) ^ 2 + dp3 r0.x, lightVec, r1 + add r0.x, zeros, -r0 + dp3 r0.y, -lightHalfVec, r1 + max r0, zeros, r0 + mul r0.y, r0, r0 + + ; Accumulate the vertex color in r1, initializing it to the emission color + mov r1, mat_emi + + ; r1 += specularColor * lightClr * shininessLevel + mul r2, lightClr, r0.yyyy + mul r2, mat_spe, r2 + add r1, r2, r1 + + ; r1 += diffuseColor * lightClr * diffuseLevel + mul r2, lightClr, r0.xxxx + mul r2, mat_dif, r2 + add r1, r2, r1 + + ; r1 += ambientColor * lightClr + mov r2, lightClr + mul r2, mat_amb, r2 + add r1, r2, r1 + + ; outclr = clamp r1 to [0,1] + min outclr, ones, r1 + + ; We're finished + end +.end diff --git a/include/c3d/types.h b/include/c3d/types.h index 6575056..c6d8b83 100644 --- a/include/c3d/types.h +++ b/include/c3d/types.h @@ -3,23 +3,17 @@ typedef u32 C3D_IVec; -typedef struct +typedef union { - union - { - struct { float w, z, y, x; }; - float c[4]; - }; + struct { float w, z, y, x; }; + float c[4]; } C3D_FVec; // Row-major 4x4 matrix -typedef struct +typedef union { - union - { - C3D_FVec r[4]; // Rows are vectors - float m[4*4]; - }; + C3D_FVec r[4]; // Rows are vectors + float m[4*4]; } C3D_Mtx; static inline C3D_IVec IVec_Pack(u8 x, u8 y, u8 z, u8 w)