commit 646a0fdcbe6bd6838f0d4a0639f32ba888ae1ac6
parent 41be94b6da3ad67a73189d9e63b8766d3bd1516c
Author: David DiPaola <DavidDiPaola@users.noreply.github.com>
Date: Sun, 3 Jun 2018 12:33:40 -0400
remove junk file
Diffstat:
| D | 01-perspective-orig.c | | | 236 | ------------------------------------------------------------------------------- |
1 file changed, 0 insertions(+), 236 deletions(-)
diff --git a/01-perspective-orig.c b/01-perspective-orig.c
@@ -1,236 +0,0 @@
-/*
-2018 David DiPaola
-licensed under CC0 (public domain, see https://creativecommons.org/publicdomain/zero/1.0/)
-*/
-
-#include <stdio.h>
-
-#include <stdlib.h>
-
-#include <GL/glew.h>
-#include <GLFW/glfw3.h>
-#include "ogl/ogl.h"
-
-int
-ogl_program_uniform_set_m4f(
- GLint program_ID, const char * uniform_name, const float * matrix4by4
-) {
- GLint uniform_ID = 0;
- int status = ogl_program_uniform_get_ID(program_ID, uniform_name, &uniform_ID);
- if (status < 0) {
- fprintf(stderr, "\t" "at %s : %d" "\n", __FILE__, __LINE__);
- return status;
- }
-
- glUniformMatrix4fv(uniform_ID, 1, GL_FALSE, matrix4by4);
-
- return 0;
-}
-
-struct ogl_vec3f {
- GLfloat x;
- GLfloat y;
- GLfloat z;
-};
-
-int
-ogl_model_set(
- GLint program_ID, const char * uniform_name
-) {
- GLfloat model[4*4] = {
- 1.0f, 0.0f, 0.0f, 0.0f,
- 0.0f, 1.0f, 0.0f, 0.0f,
- 0.0f, 0.0f, 1.0f, 0.0f,
- 0.0f, 0.0f, 0.0f, 1.0f,
- };
- int status = ogl_program_uniform_set_m4f(program_ID, uniform_name, model);
- if (status < 0) {
- fprintf(stderr, "\t" "at %s : %d" "\n", __FILE__, __LINE__);
- return status;
- }
-
- return 0;
-}
-
-int
-ogl_view_set(
- GLint program_ID, const char * uniform_name, struct ogl_vec3f location, struct ogl_vec3f direction
-) {
- GLfloat view[4*4] = /*{
- location.x, location.y, location.z, 0.0f,
- direction.x, direction.y, direction.z, 0.0f,
- 0.0f, 1.0f, 0.0f, 0.0f,
- 0.0f, 0.0f, 0.0f, 1.0f,
- */
- {
- 0.600000, 0.000000, -0.800000, -0.000000,
- -0.411597, 0.857493, -0.308697, -0.000000,
- 0.685994, 0.514496, 0.514496, -5.830953,
- 0.000000, 0.000000, 0.000000, 1.000000,
- };
- int status = ogl_program_uniform_set_m4f(program_ID, uniform_name, view);
- if (status < 0) {
- fprintf(stderr, "\t" "at %s : %d" "\n", __FILE__, __LINE__);
- return status;
- }
-
- return 0;
-}
-
-int
-ogl_projection_set(
- GLint program_ID, const char * uniform_name, GLfloat left, GLfloat right, GLfloat bottom, GLfloat top, GLfloat nearVal, GLfloat farVal
-) {
- GLfloat projection[4*4] = /*{
- (2*nearVal)/(right-left), 0.0f, (right+left)/(right-left), 0.0f,
- 0.0f, (2*nearVal)/(top-bottom), (top+bottom)/(top-bottom), 0.0f,
- 0.0f, 0.0f, (farVal+nearVal)/(farVal-nearVal), (2*farVal*nearVal)/(farVal-nearVal),
- 0.0f, 0.0f, -1.0f, 0.0f,
- */
- {
- 1.344443, 0.000000, 0.000000, 0.000000,
- 0.000000, 1.792591, 0.000000, 0.000000,
- 0.000000, 0.000000, -1.002002, -0.200200,
- 0.000000, 0.000000, -1.000000, 0.000000,
- };
- int status = ogl_program_uniform_set_m4f(program_ID, uniform_name, projection);
- if (status < 0) {
- fprintf(stderr, "\t" "at %s : %d" "\n", __FILE__, __LINE__);
- return status;
- }
-
- return 0;
-}
-
-
-int
-main() {
- int status;
-
- GLFWwindow * window = NULL;
- status = ogl_init(400, 240, "01 - triangle with perspective", &window);
- if (status < 0) {
- fprintf(stderr, "\t" "at %s : %d" "\n", __FILE__, __LINE__);
- return status;
- }
-
- const char * vertexshader =
- "#version 100" "\n"
-#if 0
- "uniform mat4 model;" "\n"
- "uniform mat4 view;" "\n"
- "uniform mat4 projection;" "\n"
-#endif
- "uniform mat4 MVP;" "\n"
- "attribute vec4 position;" "\n"
- "void main(){" "\n"
- //" gl_Position = projection * view * model * position;" "\n"
- " gl_Position = MVP * position;" "\n"
- //" gl_Position = position;" "\n"
- "}" "\n"
- ;
- const char * fragmentshader =
- "#version 100" "\n"
- "void main() {" "\n"
- " gl_FragColor = vec4(1,0,0,1);" "\n"
- "}" "\n"
- ;
- GLuint program_ID = 0;
- status = ogl_program_build(
- vertexshader, fragmentshader,
- &program_ID
- );
- if (status < 0) {
- fprintf(stderr, "\t" "at %s : %d" "\n", __FILE__, __LINE__);
- return status;
- }
-
- GLint program_attribute_position_ID = 0;
- status = ogl_program_attribute_get_ID(program_ID, "position", &program_attribute_position_ID);
- if (status < 0) {
- fprintf(stderr, "\t" "at %s : %d" "\n", __FILE__, __LINE__);
- return status;
- }
-
-#if 0
- status = ogl_model_set(program_ID, "model");
- if (status < 0) {
- fprintf(stderr, "\t" "at %s : %d" "\n", __FILE__, __LINE__);
- return status;
- }
-
- struct ogl_vec3f view_location = { .x=4.0f, .y=3.0f, .z=3.0f };
- struct ogl_vec3f view_direction = { .x=0.0f, .y=0.0f, .z=0.0f };
- status = ogl_view_set(program_ID, "view", view_location, view_direction);
- if (status < 0) {
- fprintf(stderr, "\t" "at %s : %d" "\n", __FILE__, __LINE__);
- return status;
- }
-
- status = ogl_projection_set(program_ID, "projection",
- -100.0f, 100.0f, /* left, right */
- -100.0f, 100.0f, /* bottom, top */
- 0.5f, 5.0f /* nearVal, farVal */
- );
- if (status < 0) {
- fprintf(stderr, "\t" "at %s : %d" "\n", __FILE__, __LINE__);
- return status;
- }
-#endif
-#if 1
- GLfloat MVP[4*4] = {
- 0.806666, 0.000000, -1.075554, 0.000000,
- -0.737824, 1.537134, -0.553368, 0.000000,
- -0.687368, -0.515526, -0.515526, 5.642426,
- -0.685994, -0.514496, -0.514496, 5.830953,
- };
- ogl_program_uniform_set_m4f(program_ID, "MVP", MVP);
-#endif
-
- static const GLfloat triangle_vertex_data[] = {
- -1.0f, -1.0f, 0.0f,
- 1.0f, -1.0f, 0.0f,
- 0.0f, 1.0f, 0.0f,
- };
- GLuint triangle_vertex_buffer_ID = 0;
- status = ogl_vertex_buffer_load(triangle_vertex_data, sizeof(triangle_vertex_data), &triangle_vertex_buffer_ID);
- if (status < 0) {
- return status;
- }
-
- do {
- glClear(GL_COLOR_BUFFER_BIT);
-
- glUseProgram(program_ID);
-
- glEnableVertexAttribArray(program_attribute_position_ID);
- glBindBuffer(GL_ARRAY_BUFFER, triangle_vertex_buffer_ID);
- glVertexAttribPointer(
- program_attribute_position_ID, // The attribute we want to configure
- 3, // size
- GL_FLOAT, // type
- GL_FALSE, // is normalized?
- 0, // stride
- (GLvoid *)0 // array buffer offset
- );
- glDrawArrays(GL_TRIANGLES, 0, 3); // 3 indices starting at 0 -> 1 triangle
- glBindBuffer(GL_ARRAY_BUFFER, 0);
- glDisableVertexAttribArray(triangle_vertex_buffer_ID);
-
- glfwSwapBuffers(window);
- glfwPollEvents();
- }
- while (
- (glfwGetKey(window, GLFW_KEY_ESCAPE) != GLFW_PRESS)
- &&
- (glfwWindowShouldClose(window) == 0)
- );
-
- glDeleteBuffers(1, &triangle_vertex_buffer_ID);
- glDeleteProgram(program_ID);
-
- glfwTerminate();
-
- return 0;
-}
-
