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This commit is contained in:
Zack Buhman 2025-12-04 08:21:51 -06:00
commit 59ba6e43d0
13 changed files with 4839 additions and 0 deletions
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3
.gitignore vendored Normal file
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*.o
*.d
main

111
Makefile Normal file
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.SUFFIXES:
.INTERMEDIATE:
.SECONDARY:
.PHONY: all clean
MAKEFILE_PATH := $(patsubst %/,%,$(dir $(abspath $(firstword $(MAKEFILE_LIST)))))
DEBUG = -g
CSTD += -std=gnu23
CXXSTD += -std=gnu++23
CFLAGS += -Wall -Werror -Wfatal-errors
CFLAGS += -Wno-error=unused-function
CFLAGS += -Wno-error=unused-const-variable
CFLAGS += -I$(MAKEFILE_PATH)/include
#CFLAGS += $(shell pkg-config --cflags glfw3)
#CFLAGS += $(shell pkg-config --cflags freetype2)
LDFLAGS += -lm
#LDFLAGS += $(shell pkg-config --libs glfw3)
LDFLAGS += -z noexecstack
#LDFLAGS += $(shell pkg-config --libs freetype2)
ifndef GLFW
$(error GLFW undefined)
endif
ifeq ($(shell uname),Linux)
OBJARCH = -O elf64-x86-64
else
OBJARCH = -O pe-x86-64
endif
DEPFLAGS = -MMD -MP
OPT = -Og
all: main
define BUILD_BINARY_O
objcopy \
-I binary $(OBJARCH) \
--rename-section .data=.data.$(basename $@) \
$< $@
endef
makefile_path := $(dir $(abspath $(firstword $(MAKEFILE_LIST))))
makefile_relative = $(shell realpath --relative-to $(makefile_path) $(1))
as_obj_binary = $(subst -,_,$(subst .,_,$(subst /,_,$(subst .h,,$(call makefile_relative,$(1))))))
as_obj_binary_p = _binary_$(call as_obj_binary,$(1))
define BUILD_BINARY_H
@echo gen $(call makefile_relative,$@)
@echo '#pragma once' > $@
@echo '' >> $@
@echo '#include <stdint.h>' >> $@
@echo '' >> $@
@echo '#ifdef __cplusplus' >> $@
@echo 'extern "C" {' >> $@
@echo '#endif' >> $@
@echo '' >> $@
@echo 'extern uint32_t $(call as_obj_binary_p,$<)_start __asm("$(call as_obj_binary_p,$<)_start");' >> $@
@echo 'extern uint32_t $(call as_obj_binary_p,$<)_end __asm("$(call as_obj_binary_p,$<)_end");' >> $@
@echo 'extern uint32_t $(call as_obj_binary_p,$<)_size __asm("$(call as_obj_binary_p,$<)_size");' >> $@
@echo '' >> $@
@echo '#define $(call as_obj_binary,$<)_start ((void *)&$(call as_obj_binary_p,$<)_start)' >> $@
@echo '#define $(call as_obj_binary,$<)_end ((void *)&$(call as_obj_binary_p,$<)_end)' >> $@
@echo '#define $(call as_obj_binary,$<)_size ($(call as_obj_binary,$<)_end - $(call as_obj_binary,$<)_start)' >> $@
@echo '' >> $@
@echo '#ifdef __cplusplus' >> $@
@echo '}' >> $@
@echo '#endif' >> $@
endef
%.glsl.o: %.glsl
$(BUILD_BINARY_O)
include/shader/%.glsl.h: src/shader/%.glsl
$(BUILD_BINARY_H)
clean:
rm -f *.o *.d *.gch
rm -f main
%.o: %.cpp
$(CXX) $(CXXSTD) $(CFLAGS) $(OPT) $(DEBUG) $(DEPFLAGS) -MF ${<}.d -c $< -o $@
%.o: %.c
$(CC) $(CSTD) $(CFLAGS) $(OPT) $(DEBUG) $(DEPFLAGS) -MF ${<}.d -c $< -o $@
MAIN_OBJS = \
src/main.o \
src/glad.o \
$(patsubst %.glsl,%.glsl.o,$(wildcard src/shader/*.glsl)) \
$(GLFW)
main: $(MAIN_OBJS)
$(CXX) $^ -o $@ $(LDFLAGS)
#-include $(shell find -type f -name 'src/*.d')
.SUFFIXES:
.INTERMEDIATE:
.SECONDARY:
.PHONY: all clean
%: RCS/%,v
%: RCS/%
%: %,v
%: s.%
%: SCCS/s.%

311
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#ifndef __khrplatform_h_
#define __khrplatform_h_
/*
** Copyright (c) 2008-2018 The Khronos Group Inc.
**
** Permission is hereby granted, free of charge, to any person obtaining a
** copy of this software and/or associated documentation files (the
** "Materials"), to deal in the Materials without restriction, including
** without limitation the rights to use, copy, modify, merge, publish,
** distribute, sublicense, and/or sell copies of the Materials, and to
** permit persons to whom the Materials are furnished to do so, subject to
** the following conditions:
**
** The above copyright notice and this permission notice shall be included
** in all copies or substantial portions of the Materials.
**
** THE MATERIALS ARE PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
** EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
** MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
** IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
** CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
** TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
** MATERIALS OR THE USE OR OTHER DEALINGS IN THE MATERIALS.
*/
/* Khronos platform-specific types and definitions.
*
* The master copy of khrplatform.h is maintained in the Khronos EGL
* Registry repository at https://github.com/KhronosGroup/EGL-Registry
* The last semantic modification to khrplatform.h was at commit ID:
* 67a3e0864c2d75ea5287b9f3d2eb74a745936692
*
* Adopters may modify this file to suit their platform. Adopters are
* encouraged to submit platform specific modifications to the Khronos
* group so that they can be included in future versions of this file.
* Please submit changes by filing pull requests or issues on
* the EGL Registry repository linked above.
*
*
* See the Implementer's Guidelines for information about where this file
* should be located on your system and for more details of its use:
* http://www.khronos.org/registry/implementers_guide.pdf
*
* This file should be included as
* #include <KHR/khrplatform.h>
* by Khronos client API header files that use its types and defines.
*
* The types in khrplatform.h should only be used to define API-specific types.
*
* Types defined in khrplatform.h:
* khronos_int8_t signed 8 bit
* khronos_uint8_t unsigned 8 bit
* khronos_int16_t signed 16 bit
* khronos_uint16_t unsigned 16 bit
* khronos_int32_t signed 32 bit
* khronos_uint32_t unsigned 32 bit
* khronos_int64_t signed 64 bit
* khronos_uint64_t unsigned 64 bit
* khronos_intptr_t signed same number of bits as a pointer
* khronos_uintptr_t unsigned same number of bits as a pointer
* khronos_ssize_t signed size
* khronos_usize_t unsigned size
* khronos_float_t signed 32 bit floating point
* khronos_time_ns_t unsigned 64 bit time in nanoseconds
* khronos_utime_nanoseconds_t unsigned time interval or absolute time in
* nanoseconds
* khronos_stime_nanoseconds_t signed time interval in nanoseconds
* khronos_boolean_enum_t enumerated boolean type. This should
* only be used as a base type when a client API's boolean type is
* an enum. Client APIs which use an integer or other type for
* booleans cannot use this as the base type for their boolean.
*
* Tokens defined in khrplatform.h:
*
* KHRONOS_FALSE, KHRONOS_TRUE Enumerated boolean false/true values.
*
* KHRONOS_SUPPORT_INT64 is 1 if 64 bit integers are supported; otherwise 0.
* KHRONOS_SUPPORT_FLOAT is 1 if floats are supported; otherwise 0.
*
* Calling convention macros defined in this file:
* KHRONOS_APICALL
* KHRONOS_APIENTRY
* KHRONOS_APIATTRIBUTES
*
* These may be used in function prototypes as:
*
* KHRONOS_APICALL void KHRONOS_APIENTRY funcname(
* int arg1,
* int arg2) KHRONOS_APIATTRIBUTES;
*/
#if defined(__SCITECH_SNAP__) && !defined(KHRONOS_STATIC)
# define KHRONOS_STATIC 1
#endif
/*-------------------------------------------------------------------------
* Definition of KHRONOS_APICALL
*-------------------------------------------------------------------------
* This precedes the return type of the function in the function prototype.
*/
#if defined(KHRONOS_STATIC)
/* If the preprocessor constant KHRONOS_STATIC is defined, make the
* header compatible with static linking. */
# define KHRONOS_APICALL
#elif defined(_WIN32)
# define KHRONOS_APICALL __declspec(dllimport)
#elif defined (__SYMBIAN32__)
# define KHRONOS_APICALL IMPORT_C
#elif defined(__ANDROID__)
# define KHRONOS_APICALL __attribute__((visibility("default")))
#else
# define KHRONOS_APICALL
#endif
/*-------------------------------------------------------------------------
* Definition of KHRONOS_APIENTRY
*-------------------------------------------------------------------------
* This follows the return type of the function and precedes the function
* name in the function prototype.
*/
#if defined(_WIN32) && !defined(_WIN32_WCE) && !defined(__SCITECH_SNAP__)
/* Win32 but not WinCE */
# define KHRONOS_APIENTRY __stdcall
#else
# define KHRONOS_APIENTRY
#endif
/*-------------------------------------------------------------------------
* Definition of KHRONOS_APIATTRIBUTES
*-------------------------------------------------------------------------
* This follows the closing parenthesis of the function prototype arguments.
*/
#if defined (__ARMCC_2__)
#define KHRONOS_APIATTRIBUTES __softfp
#else
#define KHRONOS_APIATTRIBUTES
#endif
/*-------------------------------------------------------------------------
* basic type definitions
*-----------------------------------------------------------------------*/
#if (defined(__STDC_VERSION__) && __STDC_VERSION__ >= 199901L) || defined(__GNUC__) || defined(__SCO__) || defined(__USLC__)
/*
* Using <stdint.h>
*/
#include <stdint.h>
typedef int32_t khronos_int32_t;
typedef uint32_t khronos_uint32_t;
typedef int64_t khronos_int64_t;
typedef uint64_t khronos_uint64_t;
#define KHRONOS_SUPPORT_INT64 1
#define KHRONOS_SUPPORT_FLOAT 1
/*
* To support platform where unsigned long cannot be used interchangeably with
* inptr_t (e.g. CHERI-extended ISAs), we can use the stdint.h intptr_t.
* Ideally, we could just use (u)intptr_t everywhere, but this could result in
* ABI breakage if khronos_uintptr_t is changed from unsigned long to
* unsigned long long or similar (this results in different C++ name mangling).
* To avoid changes for existing platforms, we restrict usage of intptr_t to
* platforms where the size of a pointer is larger than the size of long.
*/
#if defined(__SIZEOF_LONG__) && defined(__SIZEOF_POINTER__)
#if __SIZEOF_POINTER__ > __SIZEOF_LONG__
#define KHRONOS_USE_INTPTR_T
#endif
#endif
#elif defined(__VMS ) || defined(__sgi)
/*
* Using <inttypes.h>
*/
#include <inttypes.h>
typedef int32_t khronos_int32_t;
typedef uint32_t khronos_uint32_t;
typedef int64_t khronos_int64_t;
typedef uint64_t khronos_uint64_t;
#define KHRONOS_SUPPORT_INT64 1
#define KHRONOS_SUPPORT_FLOAT 1
#elif defined(_WIN32) && !defined(__SCITECH_SNAP__)
/*
* Win32
*/
typedef __int32 khronos_int32_t;
typedef unsigned __int32 khronos_uint32_t;
typedef __int64 khronos_int64_t;
typedef unsigned __int64 khronos_uint64_t;
#define KHRONOS_SUPPORT_INT64 1
#define KHRONOS_SUPPORT_FLOAT 1
#elif defined(__sun__) || defined(__digital__)
/*
* Sun or Digital
*/
typedef int khronos_int32_t;
typedef unsigned int khronos_uint32_t;
#if defined(__arch64__) || defined(_LP64)
typedef long int khronos_int64_t;
typedef unsigned long int khronos_uint64_t;
#else
typedef long long int khronos_int64_t;
typedef unsigned long long int khronos_uint64_t;
#endif /* __arch64__ */
#define KHRONOS_SUPPORT_INT64 1
#define KHRONOS_SUPPORT_FLOAT 1
#elif 0
/*
* Hypothetical platform with no float or int64 support
*/
typedef int khronos_int32_t;
typedef unsigned int khronos_uint32_t;
#define KHRONOS_SUPPORT_INT64 0
#define KHRONOS_SUPPORT_FLOAT 0
#else
/*
* Generic fallback
*/
#include <stdint.h>
typedef int32_t khronos_int32_t;
typedef uint32_t khronos_uint32_t;
typedef int64_t khronos_int64_t;
typedef uint64_t khronos_uint64_t;
#define KHRONOS_SUPPORT_INT64 1
#define KHRONOS_SUPPORT_FLOAT 1
#endif
/*
* Types that are (so far) the same on all platforms
*/
typedef signed char khronos_int8_t;
typedef unsigned char khronos_uint8_t;
typedef signed short int khronos_int16_t;
typedef unsigned short int khronos_uint16_t;
/*
* Types that differ between LLP64 and LP64 architectures - in LLP64,
* pointers are 64 bits, but 'long' is still 32 bits. Win64 appears
* to be the only LLP64 architecture in current use.
*/
#ifdef KHRONOS_USE_INTPTR_T
typedef intptr_t khronos_intptr_t;
typedef uintptr_t khronos_uintptr_t;
#elif defined(_WIN64)
typedef signed long long int khronos_intptr_t;
typedef unsigned long long int khronos_uintptr_t;
#else
typedef signed long int khronos_intptr_t;
typedef unsigned long int khronos_uintptr_t;
#endif
#if defined(_WIN64)
typedef signed long long int khronos_ssize_t;
typedef unsigned long long int khronos_usize_t;
#else
typedef signed long int khronos_ssize_t;
typedef unsigned long int khronos_usize_t;
#endif
#if KHRONOS_SUPPORT_FLOAT
/*
* Float type
*/
typedef float khronos_float_t;
#endif
#if KHRONOS_SUPPORT_INT64
/* Time types
*
* These types can be used to represent a time interval in nanoseconds or
* an absolute Unadjusted System Time. Unadjusted System Time is the number
* of nanoseconds since some arbitrary system event (e.g. since the last
* time the system booted). The Unadjusted System Time is an unsigned
* 64 bit value that wraps back to 0 every 584 years. Time intervals
* may be either signed or unsigned.
*/
typedef khronos_uint64_t khronos_utime_nanoseconds_t;
typedef khronos_int64_t khronos_stime_nanoseconds_t;
#endif
/*
* Dummy value used to pad enum types to 32 bits.
*/
#ifndef KHRONOS_MAX_ENUM
#define KHRONOS_MAX_ENUM 0x7FFFFFFF
#endif
/*
* Enumerated boolean type
*
* Values other than zero should be considered to be true. Therefore
* comparisons should not be made against KHRONOS_TRUE.
*/
typedef enum {
KHRONOS_FALSE = 0,
KHRONOS_TRUE = 1,
KHRONOS_BOOLEAN_ENUM_FORCE_SIZE = KHRONOS_MAX_ENUM
} khronos_boolean_enum_t;
#endif /* __khrplatform_h_ */

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static void * read_file(const char * filename)
{
int fd = open(filename, O_RDONLY);
if (fd == -1) {
fprintf(stderr, "open(%s): %s\n", filename, strerror(errno));
return NULL;
}
off_t size = lseek(fd, 0, SEEK_END);
if (size == (off_t)-1) {
fprintf(stderr, "lseek(%s, SEEK_END): %s\n", filename, strerror(errno));
return NULL;
}
off_t start = lseek(fd, 0, SEEK_SET);
if (start == (off_t)-1) {
fprintf(stderr, "lseek(%s, SEEK_SET): %s\n", filename, strerror(errno));
return NULL;
}
void * buf = malloc(size+1);
ssize_t read_size = read(fd, buf, size);
if (read_size == -1) {
fprintf(stderr, "read(%s): %s\n", filename, strerror(errno));
return NULL;
}
((char*)buf)[read_size] = 0;
return buf;
}

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unsigned int compile_shader(const char * vp_path, const char * fp_path);
int make_buffer(unsigned int target,
const void * data,
size_t size);

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#pragma once
#include <stdint.h>
#ifdef __cplusplus
extern "C" {
#endif
extern uint32_t _binary_src_shader_vertex_color_fp_glsl_start __asm("_binary_src_shader_vertex_color_fp_glsl_start");
extern uint32_t _binary_src_shader_vertex_color_fp_glsl_end __asm("_binary_src_shader_vertex_color_fp_glsl_end");
extern uint32_t _binary_src_shader_vertex_color_fp_glsl_size __asm("_binary_src_shader_vertex_color_fp_glsl_size");
#define src_shader_vertex_color_fp_glsl_start ((void *)&_binary_src_shader_vertex_color_fp_glsl_start)
#define src_shader_vertex_color_fp_glsl_end ((void *)&_binary_src_shader_vertex_color_fp_glsl_end)
#define src_shader_vertex_color_fp_glsl_size (src_shader_vertex_color_fp_glsl_end - src_shader_vertex_color_fp_glsl_start)
#ifdef __cplusplus
}
#endif

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#pragma once
#include <stdint.h>
#ifdef __cplusplus
extern "C" {
#endif
extern uint32_t _binary_src_shader_vertex_color_vp_glsl_start __asm("_binary_src_shader_vertex_color_vp_glsl_start");
extern uint32_t _binary_src_shader_vertex_color_vp_glsl_end __asm("_binary_src_shader_vertex_color_vp_glsl_end");
extern uint32_t _binary_src_shader_vertex_color_vp_glsl_size __asm("_binary_src_shader_vertex_color_vp_glsl_size");
#define src_shader_vertex_color_vp_glsl_start ((void *)&_binary_src_shader_vertex_color_vp_glsl_start)
#define src_shader_vertex_color_vp_glsl_end ((void *)&_binary_src_shader_vertex_color_vp_glsl_end)
#define src_shader_vertex_color_vp_glsl_size (src_shader_vertex_color_vp_glsl_end - src_shader_vertex_color_vp_glsl_start)
#ifdef __cplusplus
}
#endif

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#include <stdio.h>
#include "glad/glad.h"
#include <GLFW/glfw3.h>
#include "shader/vertex_color.fp.glsl.h"
#include "shader/vertex_color.vp.glsl.h"
static int vp_width = 800;
static int vp_height = 600;
void framebuffer_size_callback(GLFWwindow* window, int width, int height)
{
glViewport(0, 0, width, height);
vp_width = width;
vp_height = height;
}
static const float triangle_vertex_buffer_data[] = {
// position // color
0.5f, -0.5f, 0.0f, 1.0f, 0.0f, 0.0f, // bottom right
-0.5f, -0.5f, 0.0f, 0.0f, 1.0f, 0.0f, // bottom left
0.0f, 0.5f, 0.0f, 0.0f, 0.0f, 1.0f // top
};
int main()
{
//////////////////////////////////////////////////////////////////////
// window initialization
//////////////////////////////////////////////////////////////////////
#ifdef __linux__
glfwInitHint(GLFW_PLATFORM, GLFW_PLATFORM_X11);
#endif
glfwInit();
glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 2);
glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 1);
GLFWwindow* window = glfwCreateWindow(vp_width, vp_height, "breakout", NULL, NULL);
if (window == NULL) {
const char* description;
glfwGetError(&description);
fprintf(stderr, "Failed to create GLFW window: %s\n", description);
glfwTerminate();
return -1;
}
glfwMakeContextCurrent(window);
if (!gladLoadGLLoader((GLADloadproc)glfwGetProcAddress)) {
fprintf(stderr, "gladLoadGLLoader error\n");
return -1;
}
glViewport(0, 0, vp_width, vp_height);
glfwSetFramebufferSizeCallback(window, framebuffer_size_callback);
//////////////////////////////////////////////////////////////////////
// buffer initialization
//////////////////////////////////////////////////////////////////////
/*
unsigned int triangle_vertex_buffer = make_buffer(GL_ARRAY_BUFFER,
triangle_vertex_buffer_data,
(sizeof (triangle_vertex_buffer_data)));
*/
/*
vertex_color.program = compile_shaders("src/vertex_color.vp.glsl",
"src/vertex_color_fp_render.fp.glsl");
*/
//////////////////////////////////////////////////////////////////////
// main loop
//////////////////////////////////////////////////////////////////////
fwrite(src_shader_vertex_color_fp_glsl_start,
src_shader_vertex_color_fp_glsl_size,
1,
stdout);
while(!glfwWindowShouldClose(window)) {
if(glfwGetKey(window, GLFW_KEY_ESCAPE) == GLFW_PRESS)
glfwSetWindowShouldClose(window, true);
}
glfwTerminate();
return 0;
}

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unsigned int compile_shader(const char * vp_path, const char * fp_path)
{
void * vertexShaderSource = read_file(vp_path);
unsigned int vertexShader;
vertexShader = glCreateShader(GL_VERTEX_SHADER);
glShaderSource(vertexShader, 1, (const char **)&vertexShaderSource, NULL);
glCompileShader(vertexShader);
{
int success;
char infoLog[512];
glGetShaderiv(vertexShader, GL_COMPILE_STATUS, &success);
if(!success) {
glGetShaderInfoLog(vertexShader, 512, NULL, infoLog);
printf("vertex shader compile failed:\n%s\n", infoLog);
}
}
free(vertexShaderSource);
void * fragmentShaderSource = read_file(fp_path);
unsigned int fragmentShader;
fragmentShader = glCreateShader(GL_FRAGMENT_SHADER);
glShaderSource(fragmentShader, 1, (const char **)&fragmentShaderSource, NULL);
glCompileShader(fragmentShader);
{
int success;
char infoLog[512];
glGetShaderiv(fragmentShader, GL_COMPILE_STATUS, &success);
if(!success) {
glGetShaderInfoLog(fragmentShader, 512, NULL, infoLog);
printf("fragment shader compile failed:\n%s\n", infoLog);
}
}
free(fragmentShaderSource);
unsigned int shaderProgram;
shaderProgram = glCreateProgram();
glAttachShader(shaderProgram, vertexShader);
glAttachShader(shaderProgram, fragmentShader);
glLinkProgram(shaderProgram);
{
int success;
char infoLog[512];
glGetProgramiv(shaderProgram, GL_LINK_STATUS, &success);
if(!success) {
glGetProgramInfoLog(shaderProgram, 512, NULL, infoLog);
printf("program link failed:\n%s\n", infoLog);
}
}
glDeleteShader(vertexShader);
glDeleteShader(fragmentShader);
return shaderProgram;
}
int make_buffer(unsigned int target,
const void * data,
size_t size)
{
unsigned int buffer;
glGenBuffers(1, &buffer);
glBindBuffer(target, buffer);
glBufferData(target, size, data, GL_STATIC_DRAW);
return buffer;
}

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#version 120
//varying vec3 color_out;
void main()
{
gl_FragColor = gl_Color;
}

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#version 120
attribute vec3 position;
attribute vec3 color;
void main()
{
gl_Position = vec4(position, 1);
gl_FrontColor = vec4(color, 1);
}