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move line art to line_art namespace

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This commit is contained in:
Zack Buhman 2026-03-15 22:07:27 -05:00
parent e6c927bb39
commit 04c265e253
7 changed files with 353 additions and 315 deletions
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3
Makefile
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@ -32,7 +32,8 @@ OBJS = \
src/minecraft.o \ src/minecraft.o \
src/hud.o \ src/hud.o \
src/lighting.o \ src/lighting.o \
src/collision_scene.o src/collision_scene.o \
src/line_art.o
all: test.so all: test.so

18
include/line_art.h Normal file
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@ -0,0 +1,18 @@
#pragma once
namespace line_art {
void load();
void load_ray_vertex_buffer(XMVECTOR const & a, XMVECTOR const & b);
XMMATRIX view();
XMMATRIX projection();
void set_transform(XMMATRIX const & transform);
void draw_line(XMMATRIX const & transform, XMVECTOR const & a, XMVECTOR const & b);
void draw_sphere(XMMATRIX const & transform, XMVECTOR const & center, float radius);
void draw_capsule(XMMATRIX const & transform, XMVECTOR a, XMVECTOR b, float radius);
void draw_cube(XMMATRIX const & transform, XMVECTOR const & position);
void scene_start(XMMATRIX const & transform);
void set_color(float r, float g, float b);
}

0
shader/collision_scene.frag → shader/line_art.frag
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0
shader/collision_scene.vert → shader/line_art.vert
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347
src/collision_scene.cpp
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@ -4,184 +4,12 @@
#include "collision.h" #include "collision.h"
#include "collision_scene.h" #include "collision_scene.h"
#include "line_art.h"
namespace collision_scene { namespace collision_scene {
struct location {
struct {
unsigned int position;
} attrib;
struct {
unsigned int transform;
unsigned int use_grid_transform;
unsigned int base_color;
} uniform;
};
static unsigned int program;
static location location;
static unsigned int vertex_array_object;
static unsigned int per_vertex_buffer;
static unsigned int index_buffer;
static XMVECTOR point_position[4]; static XMVECTOR point_position[4];
static unsigned int ray_vertex_buffer;
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wnarrowing"
const _Float16 vertex_data[] = {
// 0: lines
-1.0, 0.0, 1.0, 0.0, // horizontal, left to right
0.0, 1.0, 0.0, -1.0, // vertical, top to bottom
// 4: "cube"
-1.0, 1.0, // tl
1.0, 1.0, // tr
1.0, -1.0, // br
-1.0, -1.0, // bl
// 8: "circle"
0.000000, -1.000000,
-0.195090, -0.980785,
-0.382683, -0.923880,
-0.555570, -0.831470,
-0.707107, -0.707107,
-0.831470, -0.555570,
-0.923880, -0.382683,
-0.980785, -0.195090,
-1.000000, 0.000000,
-0.980785, 0.195090,
-0.923880, 0.382683,
-0.831470, 0.555570,
-0.707107, 0.707107,
-0.555570, 0.831470,
-0.382683, 0.923880,
-0.195090, 0.980785,
0.000000, 1.000000,
0.195090, 0.980785,
0.382683, 0.923880,
0.555570, 0.831470,
0.707107, 0.707107,
0.831470, 0.555570,
0.923880, 0.382683,
0.980785, 0.195090,
1.000000, 0.000000,
0.980785, -0.195090,
0.923880, -0.382683,
0.831470, -0.555570,
0.707107, -0.707107,
0.555570, -0.831470,
0.382683, -0.923880,
0.195090, -0.980785,
};
#pragma GCC diagnostic pop
const int vertex_data_size = (sizeof (vertex_data));
const int per_vertex_size = (sizeof (_Float16)) * 2;
const unsigned short index_data[] = {
// "cube" (line strip)
0, 1, 2, 3, 0,
// "circle" (line strip)
0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15,
16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31,
0,
};
const int index_data_size = (sizeof (index_data));
void load_program()
{
program = compile_from_files("shader/collision_scene.vert",
nullptr,
"shader/collision_scene.frag");
location.attrib.position = glGetAttribLocation(program, "Position");
location.uniform.transform = glGetUniformLocation(program, "Transform");
location.uniform.use_grid_transform = glGetUniformLocation(program, "UseGridTransform");
location.uniform.base_color = glGetUniformLocation(program, "BaseColor");
}
void load_vertex_attributes()
{
glGenVertexArrays(1, &vertex_array_object);
glBindVertexArray(vertex_array_object);
glVertexBindingDivisor(0, 0);
glEnableVertexAttribArray(location.attrib.position);
glVertexAttribFormat(location.attrib.position, 2, GL_HALF_FLOAT, GL_FALSE, 0);
glVertexAttribBinding(location.attrib.position, 0);
glBindVertexArray(0);
}
void load_per_vertex_buffer()
{
glGenBuffers(1, &per_vertex_buffer);
glBindBuffer(GL_ARRAY_BUFFER, per_vertex_buffer);
glBufferData(GL_ARRAY_BUFFER, vertex_data_size, vertex_data, GL_STATIC_DRAW);
glBindBuffer(GL_ARRAY_BUFFER, 0);
}
void load_index_buffer()
{
glGenBuffers(1, &index_buffer);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, index_buffer);
glBufferData(GL_ELEMENT_ARRAY_BUFFER, index_data_size, index_data, GL_STATIC_DRAW);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0);
}
void load()
{
load_program();
load_vertex_attributes();
load_per_vertex_buffer();
load_index_buffer();
for (int i = 0; i < 4; i++)
point_position[i] = XMVectorSet(-1, -1, 0, 1);
// ray buffer
glGenBuffers(1, &ray_vertex_buffer);
}
void load_ray_vertex_buffer(XMVECTOR const & a, XMVECTOR const & b)
{
_Float16 data[] = {
(_Float16)XMVectorGetX(a), (_Float16)XMVectorGetY(a),
(_Float16)XMVectorGetX(b), (_Float16)XMVectorGetY(b),
};
glBindBuffer(GL_ARRAY_BUFFER, ray_vertex_buffer);
glBufferData(GL_ARRAY_BUFFER, 2 * 4, data, GL_DYNAMIC_DRAW);
glBindBuffer(GL_ARRAY_BUFFER, 0);
}
static inline XMMATRIX view()
{
XMVECTOR eye = XMVectorSet(0, 0, 1, 0);
XMVECTOR at = XMVectorSet(0, 0, 0, 0);
XMVECTOR up = XMVectorSet(0, 1, 0, 0);
return XMMatrixLookAtRH(eye, at, up);
}
static inline XMMATRIX projection()
{
return XMMatrixOrthographicRH(10, 10, 0, 10);
}
const float point_radius = 0.05f; const float point_radius = 0.05f;
void update(int up, int down, int left, int right, void update(int up, int down, int left, int right,
@ -210,61 +38,6 @@ namespace collision_scene {
point_position[i] = XMVector3Transform(point_position[i], XMMatrixTranslation(strafe[i], forward[i], 0)); point_position[i] = XMVector3Transform(point_position[i], XMMatrixTranslation(strafe[i], forward[i], 0));
} }
static inline void set_transform(XMMATRIX const & transform)
{
XMFLOAT4X4 float_transform;
XMStoreFloat4x4(&float_transform, transform);
glUniformMatrix4fv(location.uniform.transform, 1, false, (float *)&float_transform);
}
const int circle_base_vertex = 8;
const int circle_base_index = 5 * (sizeof (unsigned short));
void draw_line(XMMATRIX const & transform, XMVECTOR const & a, XMVECTOR const & b)
{
load_ray_vertex_buffer(a, b);
set_transform(transform);
glBindVertexBuffer(0, ray_vertex_buffer, 0, per_vertex_size);
glDrawArrays(GL_LINES, 0, 4);
}
void draw_sphere(XMMATRIX const & transform, XMVECTOR const & center, float radius)
{
XMMATRIX sphere_transform
= XMMatrixScaling(radius, radius, radius)
* XMMatrixTranslationFromVector(center)
* transform;
set_transform(sphere_transform);
glBindVertexBuffer(0, per_vertex_buffer, 0, per_vertex_size);
glDrawElementsBaseVertex(GL_LINE_STRIP, 33, GL_UNSIGNED_SHORT, (void*)(circle_base_index), circle_base_vertex);
}
void draw_capsule(XMMATRIX const & transform, XMVECTOR a, XMVECTOR b, float radius)
{
draw_sphere(transform, a, radius);
draw_sphere(transform, b, radius);
XMVECTOR abn = XMVector3Normalize(a - b);
XMVECTOR p = XMVectorSet(0, 0, 1, 0);
XMVECTOR pxabn = XMVector3Cross(abn, p);
draw_line(transform, a + pxabn * radius, b + pxabn * radius);
draw_line(transform, a - pxabn * radius, b - pxabn * radius);
}
void draw_cube(XMMATRIX const & transform, XMVECTOR const & position)
{
float cube_half = 0.5;
XMMATRIX cube_transform
= XMMatrixScaling(cube_half, cube_half, cube_half)
* XMMatrixTranslationFromVector(position)
* transform;
set_transform(cube_transform);
const int cube_base_vertex = 4;
const int cube_base_index = 0;
glDrawElementsBaseVertex(GL_LINE_STRIP, 5, GL_UNSIGNED_SHORT, (void*)(cube_base_index), cube_base_vertex);
}
static const XMVECTOR cubes[] = { static const XMVECTOR cubes[] = {
XMVectorSet(1, 1, 0, 1), XMVectorSet(1, 1, 0, 1),
XMVectorSet(-1, 1, 0, 1), XMVectorSet(-1, 1, 0, 1),
@ -274,6 +47,12 @@ namespace collision_scene {
}; };
static const int cubes_length = (sizeof (cubes)) / (sizeof (cubes[0])); static const int cubes_length = (sizeof (cubes)) / (sizeof (cubes[0]));
void load()
{
for (int i = 0; i < 4; i++)
point_position[i] = XMVectorSet(-1, -1, 0, 1);
}
void check_collisions(collision::Sphere const & sphere, XMVECTOR const & direction, void check_collisions(collision::Sphere const & sphere, XMVECTOR const & direction,
collision::state & state) collision::state & state)
{ {
@ -301,26 +80,9 @@ namespace collision_scene {
void draw() void draw()
{ {
glUseProgram(program); XMMATRIX transform = line_art::view() * line_art::projection();
glBlendFunc(GL_ONE, GL_ZERO); line_art::scene_start(transform);
glEnable(GL_DEPTH_TEST);
glDepthFunc(GL_ALWAYS);
glBindVertexArray(vertex_array_object);
glBindVertexBuffer(0, per_vertex_buffer, 0, per_vertex_size);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, index_buffer);
XMMATRIX transform = view() * projection();
// grid
glLineWidth(1.0f);
set_transform(transform);
glUniform3f(location.uniform.base_color, 0, 1, 0);
glUniform1i(location.uniform.use_grid_transform, 1);
glDrawArraysInstanced(GL_LINES, 0, 4, 7);
glUniform1i(location.uniform.use_grid_transform, 0);
collision::Sphere sphere(point_position[0], 0.48); collision::Sphere sphere(point_position[0], 0.48);
XMVECTOR direction = point_position[1] - point_position[0]; XMVECTOR direction = point_position[1] - point_position[0];
@ -332,19 +94,18 @@ namespace collision_scene {
glLineWidth(3.0f); glLineWidth(3.0f);
for (int i = 0; i < cubes_length; i++) { for (int i = 0; i < cubes_length; i++) {
XMVECTOR center = cubes[i]; XMVECTOR center = cubes[i];
draw_cube(transform, center); line_art::draw_cube(transform, center);
} }
////////////////////////////////////////////////////////////////////// //////////////////////////////////////////////////////////////////////
// collision response // collision response
////////////////////////////////////////////////////////////////////// //////////////////////////////////////////////////////////////////////
line_art::set_color(0, 0.0, 1.0);
glUniform3f(location.uniform.base_color, 0, 0.0, 1.0); line_art::draw_sphere(transform, sphere.center, sphere.radius);
draw_sphere(transform, sphere.center, sphere.radius); line_art::set_color(0, 0.5, 1.0);
glUniform3f(location.uniform.base_color, 0, 0.5, 1.0); line_art::draw_sphere(transform, sphere.center + direction, point_radius);
draw_sphere(transform, sphere.center + direction, point_radius); line_art::draw_line(transform, sphere.center, sphere.center + direction);
draw_line(transform, sphere.center, sphere.center + direction);
int intersections = 0; int intersections = 0;
while (intersections < 10) { while (intersections < 10) {
@ -360,13 +121,13 @@ namespace collision_scene {
state.intersection_position, state.intersection_position,
intersection_normal); intersection_normal);
glUniform3f(location.uniform.base_color, 1.0, 0.5, 1.0); line_art::set_color(1.0, 0.5, 1.0);
draw_line(transform, state.intersection_position, state.intersection_position + new_direction); line_art::draw_line(transform, state.intersection_position, state.intersection_position + new_direction);
glUniform3f(location.uniform.base_color, 1.0, 0.5, 0.0); line_art::set_color(1.0, 0.5, 0.0);
draw_sphere(transform, state.intersection_position, sphere.radius); line_art::draw_sphere(transform, state.intersection_position, sphere.radius);
glUniform3f(location.uniform.base_color, 1.0, 0.0, 0.0); line_art::set_color(1.0, 0.0, 0.0);
draw_sphere(transform, state.intersection_point, point_radius); line_art::draw_sphere(transform, state.intersection_point, point_radius);
// collide again // collide again
sphere.center = state.intersection_position; sphere.center = state.intersection_position;
@ -378,62 +139,62 @@ namespace collision_scene {
if (intersections == 10) { if (intersections == 10) {
//direction == XMVectorZero(); //direction == XMVectorZero();
} else { } else {
glUniform3f(location.uniform.base_color, 1.0, 1.0, 0.0); line_art::set_color(1.0, 1.0, 0.0);
draw_sphere(transform, sphere.center + direction, sphere.radius); line_art::draw_sphere(transform, sphere.center + direction, sphere.radius);
} }
/* /*
XMVECTOR pa = XMVectorSelect(sphere_aabb.min, sphere_aabb.max, g_XMSelect1000); XMVECTOR pa = XMVectorSelect(sphere_aabb.min, sphere_aabb.max, g_XMSelect1000);
XMVECTOR pb = XMVectorSelect(sphere_aabb.min, sphere_aabb.max, g_XMSelect0101); XMVECTOR pb = XMVectorSelect(sphere_aabb.min, sphere_aabb.max, g_XMSelect0101);
draw_line(transform, sphere_aabb.min, pa); line_art::draw_line(transform, sphere_aabb.min, pa);
draw_line(transform, pa, sphere_aabb.max); line_art::draw_line(transform, pa, sphere_aabb.max);
draw_line(transform, sphere_aabb.max, pb); line_art::draw_line(transform, sphere_aabb.max, pb);
draw_line(transform, pb, sphere_aabb.min); line_art::draw_line(transform, pb, sphere_aabb.min);
*/ */
//sphere_aabb.max, //sphere_aabb.max,
/* /*
// segments // segments
glUniform3f(location.uniform.base_color, 0, 0.5, 1.0); line_art::set_color(0, 0.5, 1.0);
draw_line(transform, point_position[0], point_position[1]); line_art::draw_line(transform, point_position[0], point_position[1]);
glUniform3f(location.uniform.base_color, 0, 1.0, 0.5); line_art::set_color(0, 1.0, 0.5);
draw_line(transform, point_position[2], point_position[3]); line_art::draw_line(transform, point_position[2], point_position[3]);
// points // points
glUniform3f(location.uniform.base_color, 0, 0.5, 1.0); line_art::set_color(0, 0.5, 1.0);
draw_sphere(transform, point_position[0], point_radius); line_art::draw_sphere(transform, point_position[0], point_radius);
draw_sphere(transform, point_position[1], point_radius); line_art::draw_sphere(transform, point_position[1], point_radius);
glUniform3f(location.uniform.base_color, 0, 1.0, 0.5); line_art::set_color(0, 1.0, 0.5);
draw_sphere(transform, point_position[2], point_radius); line_art::draw_sphere(transform, point_position[2], point_radius);
draw_sphere(transform, point_position[3], point_radius); line_art::draw_sphere(transform, point_position[3], point_radius);
float t1, t2; float t1, t2;
XMVECTOR c1, c2; XMVECTOR c1, c2;
collision::closest_point_segment_segment(point_position[0], point_position[1], collision::closest_point_segment_segment(point_position[0], point_position[1],
point_position[2], point_position[3], point_position[2], point_position[3],
t1, t2, c1, c2); t1, t2, c1, c2);
glUniform3f(location.uniform.base_color, 0.0, 0.5, 1.0); line_art::set_color(0.0, 0.5, 1.0);
draw_sphere(transform, c1, point_radius); line_art::draw_sphere(transform, c1, point_radius);
glUniform3f(location.uniform.base_color, 0.0, 1.0, 0.5); line_art::set_color(0.0, 1.0, 0.5);
draw_sphere(transform, c2, point_radius); line_art::draw_sphere(transform, c2, point_radius);
collision::Capsule capsule1(point_position[0], point_position[1], 0.5); collision::Capsule capsule1(point_position[0], point_position[1], 0.5);
collision::Capsule capsule2(point_position[2], point_position[3], 0.0); collision::Capsule capsule2(point_position[2], point_position[3], 0.0);
glUniform3f(location.uniform.base_color, 0, 0.5, 1.0); line_art::set_color(0, 0.5, 1.0);
draw_capsule(transform, capsule1.a, capsule1.b, capsule1.radius); line_art::draw_capsule(transform, capsule1.a, capsule1.b, capsule1.radius);
glUniform3f(location.uniform.base_color, 0, 1.0, 0.5); line_art::set_color(0, 1.0, 0.5);
//draw_capsule(transform, capsule2.a, capsule2.b, capsule2.radius); //line_art::draw_capsule(transform, capsule2.a, capsule2.b, capsule2.radius);
XMVECTOR c1_point; XMVECTOR c1_point;
XMVECTOR c2_point; XMVECTOR c2_point;
bool collided = collision::intersect_capsule_capsule(capsule1, capsule2, c1_point, c2_point); bool collided = collision::intersect_capsule_capsule(capsule1, capsule2, c1_point, c2_point);
if (collided) { if (collided) {
glUniform3f(location.uniform.base_color, 1.0, 0.0, 0.0); line_art::set_color(1.0, 0.0, 0.0);
draw_sphere(transform, c1_point, point_radius); line_art::draw_sphere(transform, c1_point, point_radius);
glUniform3f(location.uniform.base_color, 1.0, 0.5, 0.0); line_art::set_color(1.0, 0.5, 0.0);
draw_sphere(transform, c2_point, point_radius); line_art::draw_sphere(transform, c2_point, point_radius);
} }
*/ */
@ -446,7 +207,7 @@ namespace collision_scene {
* XMMatrixTranslationFromVector(cube_position) * XMMatrixTranslationFromVector(cube_position)
* transform; * transform;
set_transform(cube_transform); set_transform(cube_transform);
glUniform3f(location.uniform.base_color, 0, 0.5, 1.0); line_art::set_color(0, 0.5, 1.0);
glUniform1i(location.uniform.use_grid_transform, 0); glUniform1i(location.uniform.use_grid_transform, 0);
const int cube_base_vertex = 4; const int cube_base_vertex = 4;
const int cube_base_index = 0; const int cube_base_index = 0;
@ -454,7 +215,7 @@ namespace collision_scene {
// circle // circle
glUniform3f(location.uniform.base_color, 1.0, 0.5, 0.0); line_art::set_color(1.0, 0.5, 0.0);
draw_sphere(transform, point_position, point_radius); draw_sphere(transform, point_position, point_radius);
draw_sphere(transform, point_1_position, point_radius); draw_sphere(transform, point_1_position, point_radius);
@ -464,15 +225,15 @@ namespace collision_scene {
float t; float t;
bool intersection = intersect_ray_aabb(point_position, direction, cube_aabb, t, intersection_point); bool intersection = intersect_ray_aabb(point_position, direction, cube_aabb, t, intersection_point);
if (intersection && t > 0.0f) { if (intersection && t > 0.0f) {
glUniform3f(location.uniform.base_color, 0.9, 0.0, 0.0); line_art::set_color(0.9, 0.0, 0.0);
draw_line(transform, point_position, intersection_point); draw_line(transform, point_position, intersection_point);
draw_sphere(transform, intersection_point, point_radius); draw_sphere(transform, intersection_point, point_radius);
} else { } else {
glUniform3f(location.uniform.base_color, 0.5, 0.5, 0.5); line_art::set_color(0.5, 0.5, 0.5);
draw_line(transform, point_position, point_position + direction * 20.0f); draw_line(transform, point_position, point_position + direction * 20.0f);
} }
glUniform3f(location.uniform.base_color, 0.5, 0.0, 0.5); line_art::set_color(0.5, 0.0, 0.5);
XMVECTOR ca = XMVectorSet(1, 2.5, 0, 0); XMVECTOR ca = XMVectorSet(1, 2.5, 0, 0);
XMVECTOR cb = XMVectorSet(-1, 2, 0, 0); XMVECTOR cb = XMVectorSet(-1, 2, 0, 0);
draw_capsule(transform, ca, cb, 0.5); draw_capsule(transform, ca, cb, 0.5);

256
src/line_art.cpp Normal file
View File

@ -0,0 +1,256 @@
#include "glad/gl.h"
#include "directxmath/directxmath.h"
#include "opengl.h"
#include "line_art.h"
namespace line_art {
const float vertex_data[] = {
// 0: lines
-1.0, 0.0, 1.0, 0.0, // horizontal, left to right
0.0, 1.0, 0.0, -1.0, // vertical, top to bottom
// 4: "cube"
-1.0, 1.0, // tl
1.0, 1.0, // tr
1.0, -1.0, // br
-1.0, -1.0, // bl
// 8: "circle"
0.000000, -1.000000,
-0.195090, -0.980785,
-0.382683, -0.923880,
-0.555570, -0.831470,
-0.707107, -0.707107,
-0.831470, -0.555570,
-0.923880, -0.382683,
-0.980785, -0.195090,
-1.000000, 0.000000,
-0.980785, 0.195090,
-0.923880, 0.382683,
-0.831470, 0.555570,
-0.707107, 0.707107,
-0.555570, 0.831470,
-0.382683, 0.923880,
-0.195090, 0.980785,
0.000000, 1.000000,
0.195090, 0.980785,
0.382683, 0.923880,
0.555570, 0.831470,
0.707107, 0.707107,
0.831470, 0.555570,
0.923880, 0.382683,
0.980785, 0.195090,
1.000000, 0.000000,
0.980785, -0.195090,
0.923880, -0.382683,
0.831470, -0.555570,
0.707107, -0.707107,
0.555570, -0.831470,
0.382683, -0.923880,
0.195090, -0.980785,
};
const int vertex_data_size = (sizeof (vertex_data));
const int per_vertex_size = (sizeof (vertex_data[0])) * 2;
const unsigned short index_data[] = {
// "cube" (line strip)
0, 1, 2, 3, 0,
// "circle" (line strip)
0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15,
16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31,
0,
};
const int index_data_size = (sizeof (index_data));
struct location {
struct {
unsigned int position;
} attrib;
struct {
unsigned int transform;
unsigned int use_grid_transform;
unsigned int base_color;
} uniform;
};
static unsigned int program;
static location location;
static unsigned int vertex_array_object;
static unsigned int per_vertex_buffer;
static unsigned int index_buffer;
static unsigned int ray_vertex_buffer;
static void load_program()
{
program = compile_from_files("shader/line_art.vert",
nullptr,
"shader/line_art.frag");
location.attrib.position = glGetAttribLocation(program, "Position");
location.uniform.transform = glGetUniformLocation(program, "Transform");
location.uniform.use_grid_transform = glGetUniformLocation(program, "UseGridTransform");
location.uniform.base_color = glGetUniformLocation(program, "BaseColor");
}
static void load_vertex_attributes()
{
glGenVertexArrays(1, &vertex_array_object);
glBindVertexArray(vertex_array_object);
glVertexBindingDivisor(0, 0);
glEnableVertexAttribArray(location.attrib.position);
glVertexAttribFormat(location.attrib.position, 2, GL_FLOAT, GL_FALSE, 0);
glVertexAttribBinding(location.attrib.position, 0);
glBindVertexArray(0);
}
static void load_per_vertex_buffer()
{
glGenBuffers(1, &per_vertex_buffer);
glBindBuffer(GL_ARRAY_BUFFER, per_vertex_buffer);
glBufferData(GL_ARRAY_BUFFER, vertex_data_size, vertex_data, GL_STATIC_DRAW);
glBindBuffer(GL_ARRAY_BUFFER, 0);
}
static void load_index_buffer()
{
glGenBuffers(1, &index_buffer);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, index_buffer);
glBufferData(GL_ELEMENT_ARRAY_BUFFER, index_data_size, index_data, GL_STATIC_DRAW);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0);
}
void load()
{
load_program();
load_vertex_attributes();
load_per_vertex_buffer();
load_index_buffer();
// ray buffer
glGenBuffers(1, &ray_vertex_buffer);
}
void load_ray_vertex_buffer(XMVECTOR const & a, XMVECTOR const & b)
{
float data[] = {
XMVectorGetX(a), XMVectorGetY(a),
XMVectorGetX(b), XMVectorGetY(b),
};
glBindBuffer(GL_ARRAY_BUFFER, ray_vertex_buffer);
glBufferData(GL_ARRAY_BUFFER, (sizeof (data)), data, GL_DYNAMIC_DRAW);
glBindBuffer(GL_ARRAY_BUFFER, 0);
}
XMMATRIX view()
{
XMVECTOR eye = XMVectorSet(0, 0, 1, 0);
XMVECTOR at = XMVectorSet(0, 0, 0, 0);
XMVECTOR up = XMVectorSet(0, 1, 0, 0);
return XMMatrixLookAtRH(eye, at, up);
}
XMMATRIX projection()
{
return XMMatrixOrthographicRH(10, 10, 0, 10);
}
void set_transform(XMMATRIX const & transform)
{
XMFLOAT4X4 float_transform;
XMStoreFloat4x4(&float_transform, transform);
glUniformMatrix4fv(location.uniform.transform, 1, false, (float *)&float_transform);
}
const int circle_base_vertex = 8;
const int circle_base_index = 5 * (sizeof (unsigned short));
void draw_line(XMMATRIX const & transform, XMVECTOR const & a, XMVECTOR const & b)
{
load_ray_vertex_buffer(a, b);
set_transform(transform);
glBindVertexBuffer(0, ray_vertex_buffer, 0, per_vertex_size);
glDrawArrays(GL_LINES, 0, 4);
}
void draw_sphere(XMMATRIX const & transform, XMVECTOR const & center, float radius)
{
XMMATRIX sphere_transform
= XMMatrixScaling(radius, radius, radius)
* XMMatrixTranslationFromVector(center)
* transform;
set_transform(sphere_transform);
glBindVertexBuffer(0, per_vertex_buffer, 0, per_vertex_size);
glDrawElementsBaseVertex(GL_LINE_STRIP, 33, GL_UNSIGNED_SHORT, (void*)(circle_base_index), circle_base_vertex);
}
void draw_capsule(XMMATRIX const & transform, XMVECTOR a, XMVECTOR b, float radius)
{
draw_sphere(transform, a, radius);
draw_sphere(transform, b, radius);
XMVECTOR abn = XMVector3Normalize(a - b);
XMVECTOR p = XMVectorSet(0, 0, 1, 0);
XMVECTOR pxabn = XMVector3Cross(abn, p);
draw_line(transform, a + pxabn * radius, b + pxabn * radius);
draw_line(transform, a - pxabn * radius, b - pxabn * radius);
}
void draw_cube(XMMATRIX const & transform, XMVECTOR const & position)
{
float cube_half = 0.5;
XMMATRIX cube_transform
= XMMatrixScaling(cube_half, cube_half, cube_half)
* XMMatrixTranslationFromVector(position)
* transform;
set_transform(cube_transform);
const int cube_base_vertex = 4;
const int cube_base_index = 0;
glDrawElementsBaseVertex(GL_LINE_STRIP, 5, GL_UNSIGNED_SHORT, (void*)(cube_base_index), cube_base_vertex);
}
void scene_start(XMMATRIX const & transform)
{
glUseProgram(program);
glBlendFunc(GL_ONE, GL_ZERO);
glEnable(GL_DEPTH_TEST);
glDepthFunc(GL_ALWAYS);
glBindVertexArray(vertex_array_object);
glBindVertexBuffer(0, per_vertex_buffer, 0, per_vertex_size);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, index_buffer);
// grid
glLineWidth(1.0f);
set_transform(transform);
glUniform3f(location.uniform.base_color, 0, 1, 0);
glUniform1i(location.uniform.use_grid_transform, 1);
glDrawArraysInstanced(GL_LINES, 0, 4, 7);
glUniform1i(location.uniform.use_grid_transform, 0);
}
void set_color(float r, float g, float b)
{
glUniform3f(location.uniform.base_color, r, g, b);
}
}

44
src/test.cpp
View File

@ -17,6 +17,7 @@
#include "minecraft.h" #include "minecraft.h"
#include "hud.h" #include "hud.h"
#include "lighting.h" #include "lighting.h"
#include "line_art.h"
#include "collision_scene.h" #include "collision_scene.h"
#include "collision.h" #include "collision.h"
@ -282,9 +283,10 @@ void load(const char * source_path)
non_block::load_vertex_attributes(); non_block::load_vertex_attributes();
////////////////////////////////////////////////////////////////////// //////////////////////////////////////////////////////////////////////
// collision_scene // debug scenes
////////////////////////////////////////////////////////////////////// //////////////////////////////////////////////////////////////////////
line_art::load();
collision_scene::load(); collision_scene::load();
} }
@ -535,31 +537,31 @@ void update_mouse(int x, int y)
void draw() void draw()
{ {
glClearColor(0.0f, 0.0f, 0.0f, 0.0f); if (false) {
glClearDepth(-1.0f); glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
glClearDepth(-1.0f);
// possibly re-initialize geometry buffer if window width/height changes // possibly re-initialize geometry buffer if window width/height changes
init_geometry_buffer(geometry_buffer_pnc, geometry_buffer_pnc_types); init_geometry_buffer(geometry_buffer_pnc, geometry_buffer_pnc_types);
glBindFramebuffer(GL_DRAW_FRAMEBUFFER, geometry_buffer_pnc.framebuffer); glBindFramebuffer(GL_DRAW_FRAMEBUFFER, geometry_buffer_pnc.framebuffer);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
minecraft::draw(); minecraft::draw();
//draw_line(); //draw_line();
non_block::draw(); non_block::draw();
glBindFramebuffer(GL_DRAW_FRAMEBUFFER, 0); glBindFramebuffer(GL_DRAW_FRAMEBUFFER, 0);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
lighting::draw(); lighting::draw();
//draw_quad(); //draw_quad();
hud::draw(); hud::draw();
} else {
/* glBindFramebuffer(GL_DRAW_FRAMEBUFFER, 0);
glBindFramebuffer(GL_DRAW_FRAMEBUFFER, 0); glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); collision_scene::draw();
collision_scene::draw(); }
*/
last_frame_time = current_time; last_frame_time = current_time;
} }