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Added rendering of a cube, moving the camera around.

master
Martin Felis 2020-10-24 12:29:05 +02:00
parent 0c77b3a230
commit d7a5507774
2 changed files with 163 additions and 31 deletions
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132
src/srender.h
View File

@ -6,6 +6,7 @@ extern "C" {
#endif
#include <stdbool.h>
#include "vectorial/simd4x4f.h"
typedef struct srndr srndr;
@ -15,7 +16,7 @@ typedef struct srcmdbuf srcmdbuf;
typedef enum {
SRndrCmdTypeFrame = 0,
SRndrCmdTypeGrid,
SRndrCmdTypeBox,
SRndrCmdTypeCube,
SRndrCmdTypeLight,
SRndrCmdTypeSphere
} SRndrCmdType;
@ -61,10 +62,10 @@ void srndr_render(srndr* srndr, srview* sview, srcmdbuf* scmdbuf);
#ifdef SRENDER_IMPLEMENTATION
#include "utils.h"
#include <string.h>
#include <assert.h>
#include <string.h>
#include "utils.h"
typedef struct srndr {
} srndr;
@ -129,6 +130,7 @@ typedef struct srmeshdata {
static srmeshdata gCoordFrameMesh = {0};
static srmeshdata gGridMesh = {0};
static srmeshdata gCubeMesh = {0};
typedef struct srshader {
const char* vert_fname;
@ -284,7 +286,11 @@ void init_debug_meshes() {
glGenBuffers(1, &gDebugShapesVBOId);
glBindBuffer(GL_ARRAY_BUFFER, gDebugShapesVBOId);
glBufferData(GL_ARRAY_BUFFER, sizeof(union srvrtxdata) * DEBUG_VBO_SIZE, NULL, GL_STATIC_DRAW);
glBufferData(
GL_ARRAY_BUFFER,
sizeof(union srvrtxdata) * DEBUG_VBO_SIZE,
NULL,
GL_STATIC_DRAW);
GLintptr dbg_vbuf_offset = 0;
@ -368,13 +374,9 @@ void init_debug_meshes() {
gGridMesh.vb_id = gDebugShapesVBOId;
gGridMesh.nvertices = 44;
srvrtxdata* grid_vertices = calloc(44, sizeof(srvrtxdata));
srvrtxdata grid_def_vertex = {
0.f, 0.f, 0.f, 1.f,
0.f, 1.f, 0.f,
0.f, 0.f,
255, 255, 255, 255
};
srvrtxdata grid_vertices[44];
srvrtxdata grid_def_vertex =
{0.f, 0.f, 0.f, 1.f, 0.f, 1.f, 0.f, 0.f, 0.f, 255, 255, 255, 255};
// lines along parallel to x axis
for (int i = 0; i <= 10; i++) {
memcpy(&grid_vertices[2 * i], &grid_def_vertex, sizeof(srvrtxdata));
@ -402,8 +404,6 @@ void init_debug_meshes() {
grid_vertices);
dbg_vbuf_offset += sizeof(srvrtxdata) * 44;
free(grid_vertices);
GLuint grid_indices[44];
for (int i = 0; i < 22; i++) {
grid_indices[2 * i] = 2 * i + 6;
@ -421,6 +421,87 @@ void init_debug_meshes() {
gGridMesh.mode = GL_LINES;
gGridMesh.count = 44;
//
// Cube
//
gCubeMesh.vao_id = gDebugShapesVAId;
gCubeMesh.vb_id = gDebugShapesVBOId;
gCubeMesh.nvertices = 48;
// clang-format off
srvrtxdata cube_vertices[48] = {
// +x
{ 0.5f, -0.5f, 0.5f, 1.0f, 1.0f, 0.0f, 0.0f, 0.0f, 0.0f, 255, 0, 0, 255},
{ 0.5f, -0.5f, -0.5f, 1.0f, 1.0f, 0.0f, 0.0f, 0.0f, 0.0f, 255, 0, 0, 255},
{ 0.5f, 0.5f, -0.5f, 1.0f, 1.0f, 0.0f, 0.0f, 0.0f, 0.0f, 255, 0, 0, 255},
{ 0.5f, 0.5f, 0.5f, 1.0f, 1.0f, 0.0f, 0.0f, 0.0f, 0.0f, 255, 0, 0, 255},
// +y
{-0.5f, 0.5f, 0.5f, 1.0f, 0.0f, 1.0f, 0.0f, 0.0f, 0.0f, 0, 255, 0, 255},
{ 0.5f, 0.5f, 0.5f, 1.0f, 0.0f, 1.0f, 0.0f, 0.0f, 0.0f, 0, 255, 0, 255},
{ 0.5f, 0.5f, -0.5f, 1.0f, 0.0f, 1.0f, 0.0f, 0.0f, 0.0f, 0, 255, 0, 255},
{-0.5f, 0.5f, -0.5f, 1.0f, 0.0f, 1.0f, 0.0f, 0.0f, 0.0f, 0, 255, 0, 255},
// +z
{-0.5f, -0.5f, 0.5f, 1.0f, 0.0f, 0.0f, 1.0f, 0.0f, 0.0f, 0, 0, 255, 255},
{ 0.5f, -0.5f, 0.5f, 1.0f, 0.0f, 0.0f, 1.0f, 0.0f, 0.0f, 0, 0, 255, 255},
{ 0.5f, 0.5f, 0.5f, 1.0f, 0.0f, 0.0f, 1.0f, 0.0f, 0.0f, 0, 0, 255, 255},
{-0.5f, 0.5f, 0.5f, 1.0f, 0.0f, 0.0f, 1.0f, 0.0f, 0.0f, 0, 0, 255, 255},
// -x
{-0.5f, -0.5f, -0.5f, 1.0f, -1.0f, 0.0f, 0.0f, 0.0f, 0.0f, 128, 0, 0, 255},
{-0.5f, -0.5f, 0.5f, 1.0f, -1.0f, 0.0f, 0.0f, 0.0f, 0.0f, 128, 0, 0, 255},
{-0.5f, 0.5f, 0.5f, 1.0f, -1.0f, 0.0f, 0.0f, 0.0f, 0.0f, 128, 0, 0, 255},
{-0.5f, 0.5f, -0.5f, 1.0f, -1.0f, 0.0f, 0.0f, 0.0f, 0.0f, 128, 0, 0, 255},
// -y
{ 0.5f, -0.5f, 0.5f, 1.0f, 0.0f, -1.0f, 0.0f, 0.0f, 0.0f, 0, 128, 0, 255},
{-0.5f, -0.5f, 0.5f, 1.0f, 0.0f, -1.0f, 0.0f, 0.0f, 0.0f, 0, 128, 0, 255},
{-0.5f, -0.5f, -0.5f, 1.0f, 0.0f, -1.0f, 0.0f, 0.0f, 0.0f, 0, 128, 0, 255},
{ 0.5f, -0.5f, -0.5f, 1.0f, 0.0f, -1.0f, 0.0f, 0.0f, 0.0f, 0, 128, 0, 255},
// -z
{ 0.5f, -0.5f, -0.5f, 1.0f, 0.0f, 0.0f, -1.0f, 0.0f, 0.0f, 0, 0, 128, 255},
{-0.5f, -0.5f, -0.5f, 1.0f, 0.0f, 0.0f, -1.0f, 0.0f, 0.0f, 0, 0, 128, 255},
{-0.5f, 0.5f, -0.5f, 1.0f, 0.0f, 0.0f, -1.0f, 0.0f, 0.0f, 0, 0, 128, 255},
{ 0.5f, 0.5f, -0.5f, 1.0f, 0.0f, 0.0f, -1.0f, 0.0f, 0.0f, 0, 0, 128, 255}
};
// clang-format on
glBindBuffer(GL_ARRAY_BUFFER, gDebugShapesVBOId);
glBufferSubData(
GL_ARRAY_BUFFER,
dbg_vbuf_offset,
sizeof(srvrtxdata) * 24,
cube_vertices);
dbg_vbuf_offset += sizeof(srvrtxdata) * 24;
GLuint cube_indices[] = {
// clang-format off
0, 1, 2, 0, 2, 3,
4, 5, 6, 4, 6, 7,
8, 9, 10, 8, 10, 11,
12, 13, 14, 12, 14, 15,
16, 17, 18, 16, 18, 19,
20, 21, 22, 20, 22, 23
// clang-format on
};
for (int i = 0; i < 36; i++) {
cube_indices[i] += gCoordFrameMesh.nvertices + gGridMesh.nvertices;
}
glGenBuffers(1, &gCubeMesh.idb_id);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, gCubeMesh.idb_id);
glBufferData(
GL_ELEMENT_ARRAY_BUFFER,
sizeof(cube_indices),
cube_indices,
GL_STATIC_DRAW);
gCubeMesh.mode = GL_TRIANGLES;
gCubeMesh.count = 36;
glBindVertexArray(0);
};
@ -557,7 +638,11 @@ void srndr_run_frame_command(const srcmd* cmd) {
glBindVertexArray(gCoordFrameMesh.vao_id);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, gCoordFrameMesh.idb_id);
glDrawElements(gCoordFrameMesh.mode, gCoordFrameMesh.count, GL_UNSIGNED_INT, (void*)0);
glDrawElements(
gCoordFrameMesh.mode,
gCoordFrameMesh.count,
GL_UNSIGNED_INT,
(void*)0);
glBindBuffer(GL_ARRAY_BUFFER, 0);
glBindVertexArray(0);
@ -573,12 +658,26 @@ void srndr_run_grid_command(const srcmd* cmd) {
glBindVertexArray(0);
}
void srndr_run_cube_command(const srcmd* cmd) {
glBindVertexArray(gCubeMesh.vao_id);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, gCubeMesh.idb_id);
glDrawElements(gCubeMesh.mode, gCubeMesh.count, GL_UNSIGNED_INT, (void*)0);
glBindBuffer(GL_ARRAY_BUFFER, 0);
glBindVertexArray(0);
}
void srndr_render(srndr* srndr, srview* sview, srcmdbuf* scmdbuf) {
glBindFramebuffer(GL_DRAW_FRAMEBUFFER, sview->mFrameBufferId);
glViewport(0, 0, sview->width, sview->height);
glClearColor(0.1f, 0.1f, 0.1f, 0.1f);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glEnable(GL_DEPTH_TEST);
glEnable(GL_CULL_FACE);
glCullFace(GL_BACK);
glUseProgram(gDefaultShader.program_id);
GLint view_mat_loc =
@ -606,6 +705,9 @@ void srndr_render(srndr* srndr, srview* sview, srcmdbuf* scmdbuf) {
case SRndrCmdTypeGrid:
srndr_run_grid_command(cmd);
break;
case SRndrCmdTypeCube:
srndr_run_cube_command(cmd);
break;
default:
gLog("Invalid command type %d at index %d", cmd->type, i);
break;

32
src/vissim.cc
View File

@ -165,9 +165,10 @@ void DoRender() {
simd4x4f view;
simd4x4f proj;
simd4x4f_translation(&view, 0.1f, 0.1f, -0.5f);
simd4f eye = simd4f_create (2.f * sin(gTimer->mCurrentTime), 1.f, 2.f * cos (gTimer->mCurrentTime), 1.f);
simd4x4f_lookat(
&view,
simd4f_create(1.f, 1.f, 1.f, 1.f),
eye,
simd4f_create(0.f, 0.f, 0.f, 1.f),
simd4f_create(0.f, 1.f, 0.f, 1.f));
@ -182,6 +183,8 @@ void DoRender() {
0.5f * view_height,
-50.0f,
50.0f);
simd4x4f_perspective(&proj,
110.f * (M_PI / 180.f), view_width / view_height, 0.1f, 50.f);
srview_set_view(gView, view);
srview_set_proj(gView, proj);
@ -197,6 +200,33 @@ void DoRender() {
rcmd.type = SRndrCmdTypeGrid;
srcmdbuf_add(gRndrCmds, &rcmd);
rcmd.type = SRndrCmdTypeGrid;
simd4x4f_translation(&rcmd.mat, 10.f, 0.f, 10.f);
srcmdbuf_add(gRndrCmds, &rcmd);
simd4x4f_translation(&rcmd.mat, 10.f, 0.f, 0.f);
srcmdbuf_add(gRndrCmds, &rcmd);
simd4x4f_translation(&rcmd.mat, 10.f, 0.f, -10.f);
srcmdbuf_add(gRndrCmds, &rcmd);
simd4x4f_translation(&rcmd.mat, 0.f, 0.f, 10.f);
srcmdbuf_add(gRndrCmds, &rcmd);
simd4x4f_translation(&rcmd.mat, 0.f, 0.f, 0.f);
srcmdbuf_add(gRndrCmds, &rcmd);
simd4x4f_translation(&rcmd.mat, 0.f, 0.f, -10.f);
srcmdbuf_add(gRndrCmds, &rcmd);
simd4x4f_translation(&rcmd.mat, -10.f, 0.f, 10.f);
srcmdbuf_add(gRndrCmds, &rcmd);
simd4x4f_translation(&rcmd.mat, -10.f, 0.f, 0.f);
srcmdbuf_add(gRndrCmds, &rcmd);
simd4x4f_translation(&rcmd.mat, -10.f, 0.f, -10.f);
srcmdbuf_add(gRndrCmds, &rcmd);
srcmd_clear(&rcmd);
rcmd.type = SRndrCmdTypeCube;
srcmdbuf_add(gRndrCmds, &rcmd);
// Perform the actual render
srndr_render(gRndr, gView, gRndrCmds);
GLuint view_texture;